CVE-2026-25338: AYS ChatGPT Assistant Auth Bypass Flaw

CVE-2026-25338 Overview

A Missing Authorization vulnerability has been identified in the AI ChatBot with ChatGPT and Content Generator by AYS WordPress plugin (ays-chatgpt-assistant). 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 or privileged users.

The vulnerability is classified under CWE-862 (Missing Authorization), indicating that the plugin fails to properly verify that a user has the necessary privileges before allowing access to protected resources or functionality.

Critical Impact

Unauthorized users may be able to access or manipulate plugin features intended for administrators or authenticated users, potentially leading to data integrity issues or abuse of ChatGPT API functionality.

Affected Products

• AI ChatBot with ChatGPT and Content Generator by AYS plugin versions up to and including 2.7.4
• WordPress installations running the vulnerable ays-chatgpt-assistant plugin
• Sites utilizing the plugin's AI chatbot and content generation features

Discovery Timeline

• 2026-02-19 - CVE-2026-25338 published to NVD
• 2026-02-19 - Last updated in NVD database

Technical Details for CVE-2026-25338

Vulnerability Analysis

This vulnerability stems from a Broken Access Control flaw within the ays-chatgpt-assistant WordPress plugin. The plugin fails to implement proper authorization checks on certain AJAX endpoints or administrative functions, allowing unauthenticated or low-privileged users to access functionality that should be restricted.

In WordPress plugin development, proper access control typically requires implementing capability checks using functions like current_user_can() before executing privileged operations. When these checks are missing or improperly implemented, attackers can directly invoke protected functionality by crafting appropriate requests to the vulnerable endpoints.

The network-accessible nature of this vulnerability means attackers can exploit it remotely without requiring any prior authentication. While the integrity impact is limited, unauthorized manipulation of plugin settings or content generation features could lead to abuse of the connected ChatGPT API resources or unintended content modifications.

Root Cause

The root cause is the absence of proper authorization verification within the plugin's request handling logic. Specifically, the plugin does not adequately verify user capabilities before processing certain requests, violating the principle of least privilege. This represents a common security oversight in WordPress plugin development where developers may rely solely on WordPress nonces for CSRF protection without implementing proper capability-based access controls.

Attack Vector

The vulnerability is exploitable over the network with low attack complexity. An attacker does not require any privileges or user interaction to exploit this flaw. The attack would typically involve:

1. Identifying vulnerable AJAX endpoints or administrative functions within the plugin
2. Crafting direct HTTP requests to these endpoints
3. Bypassing the missing authorization checks to access restricted functionality
4. Potentially manipulating plugin settings, accessing ChatGPT API features, or modifying content generation parameters

Since no verified proof-of-concept code is available for this vulnerability, organizations should refer to the Patchstack Vulnerability Report for detailed technical information regarding the specific vulnerable endpoints and exploitation methodology.

Detection Methods for CVE-2026-25338

Indicators of Compromise

• Unusual or unauthorized AJAX requests to /wp-admin/admin-ajax.php targeting ays-chatgpt-assistant actions
• Unexpected modifications to plugin settings or configurations without corresponding administrator activity
• Anomalous ChatGPT API usage patterns that don't correlate with legitimate user activity
• Web server logs showing direct access attempts to plugin endpoints from unauthenticated sessions

Detection Strategies

• Monitor WordPress AJAX request logs for suspicious activity targeting the ays-chatgpt-assistant plugin action handlers
• Implement WordPress security plugins that can detect and log unauthorized access attempts to administrative functions
• Review access logs for patterns indicating automated scanning or exploitation attempts against WordPress plugin endpoints
• Deploy Web Application Firewall (WAF) rules to detect and block requests attempting to bypass authorization controls

Monitoring Recommendations

• Enable detailed WordPress debug logging to capture unauthorized access attempts
• Configure alerting for any modifications to plugin settings outside of normal administrative workflows
• Monitor ChatGPT API usage metrics for unexpected spikes that could indicate unauthorized access
• Implement real-time log analysis to detect exploitation patterns targeting broken access control vulnerabilities

How to Mitigate CVE-2026-25338

Immediate Actions Required

• Update the AI ChatBot with ChatGPT and Content Generator by AYS plugin to a version newer than 2.7.4 when a patch becomes available
• Review plugin settings and configurations for any unauthorized modifications
• Audit WordPress user accounts and permissions to ensure proper access controls are in place
• Consider temporarily disabling the plugin until a patched version is released if the risk exposure is significant

Patch Information

Organizations should monitor the official WordPress plugin repository and the Patchstack Vulnerability Report for patch availability. Update to the latest version of the ays-chatgpt-assistant plugin as soon as a security fix is released by Ays Pro.

Workarounds

• Implement Web Application Firewall (WAF) rules to restrict access to vulnerable plugin endpoints
• Use WordPress security plugins to add additional authorization layers to AJAX handlers
• Restrict access to wp-admin/admin-ajax.php for specific plugin actions using server-level access controls
• Consider disabling the plugin temporarily on high-value sites until a patch is available

# Example .htaccess rule to restrict plugin AJAX actions (adjust as needed)
# Add to WordPress root .htaccess file
<IfModule mod_rewrite.c>
    RewriteEngine On
    RewriteCond %{REQUEST_URI} ^/wp-admin/admin-ajax\.php
    RewriteCond %{QUERY_STRING} action=ays_chatgpt [NC]
    RewriteCond %{HTTP:X-WP-Nonce} ^$
    RewriteRule .* - [F,L]
</IfModule>