CVE-2025-13309: 
WordPress vulnerability analysis and mitigation

CVE-2025-13309 is an authorization bypass vulnerability in the "Accessiy By CodeConfig Accessibility – Easy One-Click Accessibility Toolbar That Truly Matters" plugin for WordPress. The flaw affects versions up to and including 1.0.2, allowing authenticated attackers with subscriber-level access or higher to modify the plugin's global accessibility settings without proper authorization checks. It was published on December 6, 2025, and assigned a CVSS v3.1 base score of 4.3 (Medium) (Wordfence, Red Hat CVE).

The root cause is classified as CWE-862 (Missing Authorization). The plugin fails to properly verify that a user is authorized to perform privileged actions before processing AJAX requests that modify global accessibility settings. Specifically, the vulnerability exists in the plugin's AJAX handler (includes/Ajax/Settings.php at line 23) and its registration logic (includes/Ajax.php at line 19), where capability checks are absent or insufficient, enabling any authenticated user — including subscribers — to invoke these endpoints over the network (Wordfence, WordPress Trac).

Exploitation allows low-privileged authenticated users to alter the plugin's global accessibility configuration, affecting the experience of all site visitors. While confidentiality and availability are not directly impacted, the integrity of site-wide accessibility settings can be tampered with, potentially degrading accessibility features for all users or introducing misleading UI elements. The scope is limited to the plugin's settings and does not directly enable code execution or data exfiltration (Wordfence).

No public proof-of-concept exploit code or evidence of in-the-wild exploitation has been reported for this vulnerability. The EPSS score is approximately 0.026% (0.000260), indicating a very low probability of exploitation in the near term. The vulnerability is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog. Exploitation requires a valid authenticated session at subscriber level or above, limiting opportunistic mass exploitation (Wordfence, Red Hat CVE).

1. Obtain a low-privileged account: Register or obtain credentials for a subscriber-level (or higher) WordPress account on a site running the vulnerable plugin (version ≤ 1.0.2).
2. Authenticate: Log in to the WordPress site to obtain a valid session cookie and nonce.
3. Identify the AJAX endpoint: Locate the plugin's AJAX action registered in includes/Ajax.php (line 19) that handles accessibility settings updates.
4. Craft a malicious AJAX request: Send an authenticated HTTP POST request to wp-admin/admin-ajax.php with the appropriate action parameter targeting the settings handler in includes/Ajax/Settings.php, including modified accessibility configuration values.
5. Modify global settings: Because no proper capability check is enforced, the server processes the request and updates the plugin's global accessibility settings, affecting all site visitors (Wordfence, WordPress Trac).

• Network: Unusual authenticated POST requests to wp-admin/admin-ajax.php from subscriber-level accounts, particularly targeting the plugin's settings AJAX action.
• Logs: WordPress access logs showing repeated AJAX requests to accessibility settings endpoints from non-administrative user accounts.
• Application: Unexpected changes to the CodeConfig Accessibility plugin's global settings in the WordPress database (wp_options table entries related to the plugin) without corresponding administrator activity.

Users should update the Accessiy By CodeConfig Accessibility plugin to a version beyond 1.0.2 if a patched release becomes available. As of the initial disclosure, no patch was confirmed; site administrators should monitor the WordPress plugin repository for updates and consider deactivating or removing the plugin until a fix is released. Additionally, restricting user registration or limiting subscriber-level accounts on the site reduces the attack surface (Wordfence).

The vulnerability was reported and disclosed by Wordfence, which serves as the CVE assigner. No significant public commentary, vendor statements beyond the CVE record, or notable media coverage has been identified for this low-severity issue.