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 (shortcodes-ultimate)

Severity Medium (CVSS 6.1)
CWE 79
Vulnerable Version 7.3.3
Patched Version 7.3.4
Disclosed April 29, 2026

Analysis Overview

Atomic Edge analysis of CVE-2024-13362: A reflected DOM-based Cross-Site Scripting (XSS) vulnerability exists in the Freemius SDK versions up to 2.10.1, which is bundled with the Shortcodes Ultimate plugin. The vulnerability allows an unauthenticated attacker to inject arbitrary web scripts into admin notices, triggered when a victim clicks a crafted link.

The root cause is insufficient input sanitization and output escaping within the `class-freemius.php` file. At line 24011, the `trial_promotion_message` filter passes user-controlled data from the `url` parameter (`$trial_url`) directly into a `

--- a/shortcodes-ultimate/admin/class-shortcodes-ultimate-widget.php
+++ b/shortcodes-ultimate/admin/class-shortcodes-ultimate-widget.php
@@ -12,7 +12,7 @@

 		$widget_ops = array(
 			'classname'   => self::$widget_prefix,
-			'description' => __( 'Shortcodes Ultimate widget', 'shortcodes-ultimate' ),
+			'description' => 'Shortcodes Ultimate widget',
 		);

 		$control_ops = array(
@@ -23,7 +23,7 @@

 		parent::__construct(
 			self::$widget_prefix,
-			__( 'Shortcodes Ultimate', 'shortcodes-ultimate' ),
+			'Shortcodes Ultimate',
 			$widget_ops,
 			$control_ops
 		);
--- a/shortcodes-ultimate/freemius/includes/class-freemius.php
+++ b/shortcodes-ultimate/freemius/includes/class-freemius.php
@@ -24000,13 +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'
@@ -25476,7 +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/shortcodes-ultimate/freemius/includes/class-fs-plugin-updater.php
+++ b/shortcodes-ultimate/freemius/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/shortcodes-ultimate/freemius/includes/entities/class-fs-plugin-plan.php
+++ b/shortcodes-ultimate/freemius/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/shortcodes-ultimate/freemius/includes/entities/class-fs-site.php
+++ b/shortcodes-ultimate/freemius/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;
--- a/shortcodes-ultimate/freemius/includes/entities/class-fs-user.php
+++ b/shortcodes-ultimate/freemius/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/shortcodes-ultimate/freemius/includes/managers/class-fs-admin-menu-manager.php
+++ b/shortcodes-ultimate/freemius/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/shortcodes-ultimate/freemius/includes/managers/class-fs-admin-notice-manager.php
+++ b/shortcodes-ultimate/freemius/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/shortcodes-ultimate/freemius/start.php
+++ b/shortcodes-ultimate/freemius/start.php
@@ -15,7 +15,7 @@
 	 *
 	 * @var string
 	 */
-	$this_sdk_version = '2.10.1';
+	$this_sdk_version = '2.11.0';

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

--- a/shortcodes-ultimate/includes/shortcodes/lightbox.php
+++ b/shortcodes-ultimate/includes/shortcodes/lightbox.php
@@ -60,10 +60,13 @@
 		'lightbox'
 	);

-	if (
-		!$atts['src']
-		|| strpos(strtolower($atts['src']), 'javascript') !== false
-	) {
+	if ( !$atts['src'] ) {
+		return su_error_message('Lightbox', __('please specify correct source', 'shortcodes-ultimate'));
+	}
+
+	$atts['src'] = su_do_attribute($atts['src'], true);
+
+	if (strpos(strtolower($atts['src']), 'javascript') !== false) {
 		return su_error_message('Lightbox', __('please specify correct source', 'shortcodes-ultimate'));
 	}

@@ -72,6 +75,6 @@
 	su_query_asset('js', 'magnific-popup');
 	su_query_asset('js', 'su-shortcodes');

-	return '<span class="su-lightbox' . su_get_css_class($atts) . '" data-mfp-src="' . su_do_attribute($atts['src']) . '" data-mfp-type="' . sanitize_key($atts['type']) . '" data-mobile="' . sanitize_key($atts['mobile']) . '">' . do_shortcode($content) . '</span>';
+	return '<span class="su-lightbox' . su_get_css_class($atts) . '" data-mfp-src="' . esc_attr($atts['src']) . '" data-mfp-type="' . sanitize_key($atts['type']) . '" data-mobile="' . sanitize_key($atts['mobile']) . '">' . do_shortcode($content) . '</span>';

 }
--- a/shortcodes-ultimate/shortcodes-ultimate.php
+++ b/shortcodes-ultimate/shortcodes-ultimate.php
@@ -8,7 +8,7 @@
  * Description: A comprehensive collection of visual components for WordPress
  * Text Domain: shortcodes-ultimate
  * License: GPLv3
- * Version: 7.3.3
+ * Version: 7.3.4
  * Requires PHP: 5.4
  * Requires at least: 5.0
  * Tested up to: 6.7
@@ -63,6 +63,6 @@
         }
     }
     define( 'SU_PLUGIN_FILE', __FILE__ );
-    define( 'SU_PLUGIN_VERSION', '7.3.3' );
+    define( 'SU_PLUGIN_VERSION', '7.3.4' );
     require_once dirname( __FILE__ ) . '/plugin.php';
 }
 No newline at end of file

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
# Block reflected XSS via url parameter in Freemius admin notices
# This rule blocks requests to admin pages where the url parameter contains JavaScript payloads
SecRule REQUEST_URI "@rx ^/wp-admin/admin.php" 
  "id:20261994,phase:2,deny,status:403,chain,msg:'CVE-2024-13362 Freemius SDK reflected XSS via url parameter',severity:'CRITICAL',tag:'CVE-2024-13362'"
  SecRule ARGS_GET:url "@rx [(ja)(vb)][s]*[:]" 
    "t:none,t:urlDecodeUni,t:lowercase,chain"
    SecRule ARGS_GET:page "@rx shortcodes-ultimate" "t:none"

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