CVE-2024-5987
📋 TL;DR
The WP Accessibility Helper WordPress plugin has an authorization vulnerability that allows authenticated users with Subscriber-level access or higher to modify contrast settings without proper permissions. This affects all versions up to and including 0.6.2.8. The vulnerability stems from missing capability checks in two specific functions.
💻 Affected Systems
- WP Accessibility Helper WordPress Plugin
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers could disable accessibility features for all users, potentially violating accessibility compliance requirements and degrading user experience for disabled visitors.
Likely Case
Malicious users could tamper with contrast settings, causing visual accessibility issues for site visitors or testing various configuration changes.
If Mitigated
With proper user role management and monitoring, impact would be limited to minor configuration changes that could be quickly reverted.
🎯 Exploit Status
Exploitation requires authenticated access (Subscriber role or higher). The vulnerability is in specific API endpoints that lack proper authorization checks.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 0.6.2.8 (though reportedly broken)
Restart Required: No
Instructions:
1. Update WP Accessibility Helper plugin to latest version. 2. Verify functionality after update. 3. Consider alternative accessibility plugins if update breaks functionality.
🔧 Temporary Workarounds
Disable Vulnerable Plugin
allTemporarily disable the WP Accessibility Helper plugin until a stable patch is available
wp plugin deactivate wp-accessibility-helper
Restrict User Roles
allLimit Subscriber and other low-privilege user accounts to reduce attack surface
🧯 If You Can't Patch
- Remove or disable the WP Accessibility Helper plugin entirely
- Implement web application firewall rules to block requests to the vulnerable endpoints
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel for WP Accessibility Helper plugin version. If version is 0.6.2.8 or lower, system is vulnerable.Check Version:
wp plugin get wp-accessibility-helper --field=versionVerify Fix Applied:
Update plugin and verify version is above 0.6.2.8. Test contrast settings functionality to ensure patch doesn't break features.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to wp-admin/admin-ajax.php with action parameters containing 'save_contrast_variations' or 'save_empty_contrast_variations' from low-privilege users
Network Indicators:
- HTTP POST requests to WordPress admin-ajax endpoints with contrast-related parameters
SIEM Query:
source="wordpress_logs" AND (action="save_contrast_variations" OR action="save_empty_contrast_variations") AND user_role IN ("subscriber", "contributor", "author")