CVE-2025-13309 Overview
CVE-2025-13309 affects the Accessiy By CodeConfig Accessibility plugin for WordPress, an accessibility toolbar plugin. The vulnerability is a missing authorization flaw [CWE-862] present in all versions up to and including 1.0.2. The plugin fails to verify that a user has appropriate privileges before allowing modifications to its global accessibility settings. Authenticated users with subscriber-level access or higher can exploit this weakness to change site-wide plugin configuration. The issue was published to the National Vulnerability Database (NVD) on December 6, 2025.
Critical Impact
Any authenticated subscriber can modify plugin-wide accessibility settings on affected WordPress sites, enabling unauthorized configuration changes that impact all visitors.
Affected Products
- Accessiy By CodeConfig Accessibility – Easy One-Click Accessibility Toolbar That Truly Matters plugin for WordPress
- All versions up to and including 1.0.2
- WordPress sites permitting subscriber-level registrations are most exposed
Discovery Timeline
- 2025-12-06 - CVE-2025-13309 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2025-13309
Vulnerability Analysis
The plugin exposes an AJAX endpoint that updates its global accessibility settings but does not perform a capability check against the requesting user. The relevant handlers reside in includes/Ajax.php and includes/Ajax/Settings.php. Because authorization enforcement is absent, any authenticated user, including a low-privileged subscriber, can invoke the settings-update action. The impact is limited to integrity of the plugin's configuration; no direct code execution or data exfiltration path is described in the advisory. However, altered accessibility settings apply to every site visitor, which can degrade site usability and potentially be chained with other issues affecting output rendered by includes/Enqueue.php.
Root Cause
The root cause is a missing authorization check [CWE-862]. The AJAX action handler validates that a request is authenticated but does not call current_user_can() with an administrative capability such as manage_options before persisting settings. A nonce alone, if present, is insufficient because subscribers can legitimately obtain one after logging in.
Attack Vector
Exploitation requires network access to the WordPress site and a valid low-privileged account. An attacker registers or uses an existing subscriber account, then issues an authenticated POST request to the vulnerable admin-ajax.php action responsible for updating settings. The server accepts the modified values without validating the caller's role. See the Wordfence Vulnerability Analysis and the plugin source in WordPress Plugin Ajax Code for the vulnerable handler.
No verified public exploit code is available. The vulnerability mechanism is described in prose above and in the referenced advisories.
Detection Methods for CVE-2025-13309
Indicators of Compromise
- Unexpected changes to Accessiy plugin settings without corresponding administrator activity in the WordPress audit log.
- Authenticated admin-ajax.php requests from subscriber-level accounts targeting the plugin's settings action.
- Newly created subscriber accounts followed shortly by AJAX requests to plugin endpoints.
Detection Strategies
- Enumerate installed plugins across managed WordPress sites and flag installations of codeconfig-accessibility at version 1.0.2 or lower.
- Inspect web server access logs for POST requests to /wp-admin/admin-ajax.php with plugin-specific action parameters originating from non-administrator sessions.
- Correlate WordPress user role data with AJAX request patterns to identify low-privileged accounts invoking privileged actions.
Monitoring Recommendations
- Enable a WordPress activity logging plugin to record configuration changes and the user role that made them.
- Alert on any modification to Accessiy plugin option keys in the wp_options table.
- Monitor subscriber account registration rates for anomalies that may indicate preparation for exploitation.
How to Mitigate CVE-2025-13309
Immediate Actions Required
- Update the Accessiy By CodeConfig Accessibility plugin to a version above 1.0.2 once a patched release is published by the vendor.
- Audit existing subscriber accounts on affected sites and remove any that are unrecognized or unnecessary.
- Review current plugin settings and revert unauthorized changes to a known-good configuration.
Patch Information
At the time of NVD publication, no fixed version is identified in the advisory. Administrators should monitor the WordPress plugin repository and the Wordfence Vulnerability Analysis for a fixed release and apply it as soon as it becomes available.
Workarounds
- Disable the Accessiy plugin until a patched version is available if accessibility functionality is not business-critical.
- Disable open user registration or restrict the default role for new registrations to prevent attackers from obtaining subscriber accounts.
- Deploy a Web Application Firewall (WAF) rule that blocks unauthenticated or low-privilege access to the plugin's AJAX settings action.
# Restrict WordPress registrations and default role via wp-config or admin settings
# 1. In WordPress admin: Settings > General > uncheck "Anyone can register"
# 2. Ensure default role is set to Subscriber only if registration is required
# 3. Temporarily deactivate the vulnerable plugin from the CLI:
wp plugin deactivate codeconfig-accessibility
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.