CVE-2026-24604: Simple GDPR Cookie Compliance Auth Bypass

CVE-2026-24604 Overview

CVE-2026-24604 is a Missing Authorization vulnerability (CWE-862) in the Simple GDPR Cookie Compliance WordPress plugin developed by themebeez. This vulnerability allows unauthenticated attackers to exploit incorrectly configured access control security levels, potentially gaining unauthorized access to plugin functionality that should be restricted to authenticated administrators.

The vulnerability stems from broken access control mechanisms within the plugin, where certain administrative functions lack proper authorization checks. This allows attackers to bypass security controls and interact with plugin features without proper authentication.

Critical Impact

Unauthenticated attackers can exploit missing authorization checks to access restricted plugin functionality, potentially compromising site configuration and GDPR compliance settings.

Affected Products

• Simple GDPR Cookie Compliance plugin versions up to and including 2.0.0
• WordPress sites using the vulnerable plugin versions
• Sites relying on the plugin for GDPR cookie consent management

Discovery Timeline

• 2026-01-23 - CVE-2026-24604 published to NVD
• 2026-01-26 - Last updated in NVD database

Technical Details for CVE-2026-24604

Vulnerability Analysis

This vulnerability is classified as a Missing Authorization issue (CWE-862), which occurs when the software does not perform authorization checks when an actor attempts to access a resource or perform an action. In the context of WordPress plugins, this typically manifests when AJAX handlers, REST API endpoints, or administrative functions fail to verify that the requesting user has appropriate capabilities before executing sensitive operations.

The Simple GDPR Cookie Compliance plugin is designed to help WordPress site owners comply with GDPR requirements by managing cookie consent banners and user preferences. Plugin administrative functions should be restricted to users with appropriate WordPress capabilities (such as manage_options), but the vulnerable versions fail to implement these checks consistently.

Root Cause

The root cause of CVE-2026-24604 is the absence of proper capability checks and nonce verification in plugin functions that should be restricted to authorized administrators. In WordPress development, administrative functions should use functions like current_user_can() to verify user capabilities and wp_verify_nonce() to validate request authenticity. The omission of these security controls allows unauthorized users to access protected functionality.

Attack Vector

This vulnerability is exploitable over the network without requiring authentication. An attacker can craft malicious HTTP requests to interact with unprotected plugin endpoints directly. The attack does not require user interaction, making it particularly dangerous for exposed WordPress installations.

The exploitation scenario involves an attacker identifying exposed AJAX actions or REST API endpoints within the plugin that lack proper authorization checks. By sending crafted requests to these endpoints, the attacker can manipulate plugin settings, potentially disabling cookie consent mechanisms or extracting configuration data.

Since no verified code examples are available for this vulnerability, site administrators should refer to the Patchstack Vulnerability Report for detailed technical analysis and remediation guidance.

Detection Methods for CVE-2026-24604

Indicators of Compromise

• Unexpected changes to GDPR cookie compliance settings or banner configurations
• Unauthorized AJAX requests targeting plugin-specific actions in web server logs
• Anomalous POST requests to /wp-admin/admin-ajax.php with plugin-related action parameters
• Modified plugin database options without corresponding admin activity logs

Detection Strategies

• Monitor WordPress admin-ajax.php requests for suspicious activity patterns involving the Simple GDPR Cookie Compliance plugin
• Implement Web Application Firewall (WAF) rules to detect and block unauthorized access attempts to plugin endpoints
• Review WordPress audit logs for configuration changes made without corresponding authenticated admin sessions
• Use security plugins to monitor for unauthorized option modifications in the WordPress database

Monitoring Recommendations

• Enable detailed logging for all AJAX requests targeting WordPress admin endpoints
• Configure alerts for plugin setting modifications outside of normal administrative hours
• Implement real-time monitoring of the wp_options table for changes to plugin-related entries
• Deploy SentinelOne Singularity to monitor web server processes for signs of exploitation attempts

How to Mitigate CVE-2026-24604

Immediate Actions Required

• Update the Simple GDPR Cookie Compliance plugin to a patched version immediately (if available from the vendor)
• If no patch is available, consider temporarily deactivating the plugin until a security update is released
• Review plugin settings for any unauthorized modifications and restore from known-good backups if necessary
• Implement additional access controls at the web server level to restrict access to WordPress admin endpoints

Patch Information

Site administrators should check for updates to the Simple GDPR Cookie Compliance plugin through the WordPress plugin repository or contact themebeez directly for security patch information. The vulnerability affects all versions through 2.0.0. For detailed vulnerability information and remediation guidance, see the Patchstack Vulnerability Report.

Workarounds

• Restrict access to /wp-admin/admin-ajax.php using web server configuration rules for untrusted IP addresses
• Implement a Web Application Firewall (WAF) with rules targeting unauthorized plugin endpoint access
• Use WordPress security plugins to add additional capability checks to AJAX handlers
• Consider alternative GDPR compliance plugins with verified security practices until a patch is available

# Apache .htaccess example to restrict admin-ajax.php access by IP
<Files admin-ajax.php>
    Order Deny,Allow
    Deny from all
    Allow from 192.168.1.0/24
    Allow from 10.0.0.0/8
</Files>