CVE-2026-24421
📋 TL;DR
This vulnerability in phpMyFAQ allows any authenticated user, regardless of permissions, to trigger configuration backups and retrieve the backup file path. Attackers can access sensitive configuration data that should be restricted to administrators. All phpMyFAQ installations running versions 4.0.16 or below are affected.
💻 Affected Systems
- phpMyFAQ
📦 What is this software?
Phpmyfaq by Phpmyfaq
⚠️ Risk & Real-World Impact
Worst Case
Attackers obtain configuration backups containing database credentials, API keys, and other sensitive data, leading to full system compromise through credential reuse or direct database access.
Likely Case
Authenticated non-admin users access configuration backups containing sensitive application settings and database credentials, potentially enabling further attacks.
If Mitigated
Only authorized administrators can access backup functionality, preventing unauthorized data exposure.
🎯 Exploit Status
Exploitation requires authenticated access but no special permissions. Simple HTTP requests to the vulnerable endpoint are sufficient.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 4.0.17
Vendor Advisory: https://github.com/thorsten/phpMyFAQ/security/advisories/GHSA-wm8h-26fv-mg7g
Restart Required: No
Instructions:
1. Backup your current installation. 2. Download phpMyFAQ 4.0.17 or newer. 3. Replace all files except config/database.php and attachments. 4. Verify the update completed successfully.
🔧 Temporary Workarounds
Block vulnerable endpoint
allUse web server configuration to block access to /api/setup/backup endpoint
# For Apache: add to .htaccess
RewriteRule ^api/setup/backup - [F,L]
# For Nginx: add to server block
location ~ ^/api/setup/backup { deny all; }
Restrict user permissions
allReview and minimize authenticated user accounts, ensure only trusted users have access
🧯 If You Can't Patch
- Implement strict network segmentation to isolate phpMyFAQ from sensitive systems
- Monitor access logs for requests to /api/setup/backup and alert on any non-admin access
🔍 How to Verify
Check if Vulnerable:
Check if authenticated non-admin user can access /api/setup/backup endpoint and receive backup file pathCheck Version:
Check phpMyFAQ admin dashboard or examine version.php fileVerify Fix Applied:
Verify that only admin users can access /api/setup/backup endpoint after update📡 Detection & Monitoring
Log Indicators:
- HTTP requests to /api/setup/backup from non-admin user accounts
- Successful backup file generation triggered by non-admin users
Network Indicators:
- HTTP POST/GET requests to vulnerable endpoint from unauthorized IPs
SIEM Query:
source="web_server_logs" AND (uri_path="/api/setup/backup" AND user_role!="admin")