CVE-2026-25363: FooGallery Auth Bypass Vulnerability

CVE-2026-25363 Overview

CVE-2026-25363 is a Missing Authorization vulnerability (CWE-862) affecting the FooPlugins FooGallery WordPress plugin. This vulnerability allows attackers to exploit incorrectly configured access control security levels, potentially enabling unauthorized access to plugin functionality that should be restricted to authenticated users with appropriate privileges.

The vulnerability stems from broken access control mechanisms within the FooGallery plugin, where certain actions or endpoints fail to properly verify user authorization before processing requests.

Critical Impact

Attackers can bypass access control restrictions in the FooGallery WordPress plugin, potentially gaining unauthorized access to gallery management functionality and sensitive operations that should require authentication or elevated privileges.

Affected Products

• FooGallery WordPress Plugin versions up to and including 3.1.11
• WordPress installations with FooGallery plugin active
• Sites utilizing FooGallery for image gallery management

Discovery Timeline

• 2026-02-19 - CVE CVE-2026-25363 published to NVD
• 2026-02-19 - Last updated in NVD database

Technical Details for CVE-2026-25363

Vulnerability Analysis

This vulnerability represents a Broken Access Control issue in the FooGallery WordPress plugin. The core problem lies in missing authorization checks, which means the plugin fails to verify whether a user has the appropriate permissions before allowing them to perform certain actions.

In WordPress plugin development, proper authorization requires checking user capabilities using functions like current_user_can() before executing privileged operations. When these checks are missing or improperly implemented, attackers can directly access administrative functionality without having the required permissions.

The impact of this vulnerability depends on which specific functionality lacks proper authorization. In gallery management plugins, this could potentially allow unauthorized users to create, modify, or delete galleries, access media files, or modify plugin settings.

Root Cause

The root cause is the absence of proper authorization verification in the FooGallery plugin's request handling logic. The plugin does not adequately validate that the requesting user has sufficient privileges before processing certain actions, violating the principle of least privilege.

WordPress plugins must implement capability checks for all privileged operations. The omission of these checks in affected versions allows any user—or in some cases unauthenticated visitors—to perform actions that should be restricted to administrators or editors.

Attack Vector

The attack vector for this vulnerability involves sending crafted requests to vulnerable plugin endpoints that lack authorization checks. An attacker could exploit this by:

1. Identifying plugin AJAX handlers or REST API endpoints that perform privileged operations
2. Crafting HTTP requests directly to these endpoints
3. Bypassing the intended access control by exploiting the missing authorization verification
4. Executing administrative actions without proper authentication or authorization

The exploitation does not require any special tools beyond a web browser or HTTP client, making it accessible to attackers with minimal technical sophistication.

Detection Methods for CVE-2026-25363

Indicators of Compromise

• Unexpected changes to FooGallery configurations or gallery content
• Unauthorized gallery creation, modification, or deletion in WordPress
• Unusual AJAX requests to FooGallery endpoints from unauthenticated sessions
• Log entries showing plugin actions without corresponding authenticated user sessions

Detection Strategies

• Monitor WordPress audit logs for FooGallery-related actions performed by unexpected users
• Implement web application firewall (WAF) rules to detect and block unauthorized access attempts
• Review access logs for direct requests to FooGallery AJAX handlers from suspicious sources
• Configure intrusion detection systems to alert on unusual patterns of plugin endpoint access

Monitoring Recommendations

• Enable comprehensive logging for WordPress plugin activities
• Set up alerts for any administrative actions performed on FooGallery without proper session authentication
• Regularly audit gallery content and plugin settings for unauthorized modifications
• Monitor for bulk or automated requests targeting FooGallery endpoints

How to Mitigate CVE-2026-25363

Immediate Actions Required

• Update FooGallery to the latest patched version immediately
• Review and audit existing gallery content for any unauthorized changes
• Implement additional access control measures at the web server or WAF level
• Consider temporarily disabling the plugin if an update is not immediately available

Patch Information

A fix for this vulnerability is expected in FooGallery versions newer than 3.1.11. Administrators should update to the latest available version through the WordPress plugin repository. For detailed vulnerability information and patch status, refer to the Patchstack Vulnerability Report.

Workarounds

• Restrict access to the WordPress admin panel using IP-based allowlisting
• Implement a web application firewall (WAF) to filter malicious requests
• Use WordPress security plugins to add additional access control layers
• Temporarily deactivate FooGallery until a patched version is available if the plugin is not critical to operations

# WordPress configuration to restrict admin access by IP
# Add to .htaccess in wp-admin directory

<IfModule mod_rewrite.c>
RewriteEngine On
RewriteCond %{REMOTE_ADDR} !^192\.168\.1\.100$
RewriteCond %{REQUEST_URI} ^/wp-admin/admin-ajax\.php
RewriteRule ^(.*)$ - [F,L]
</IfModule>