CVE-2024-12853
📋 TL;DR
The Modula Image Gallery WordPress plugin allows authenticated attackers with Author-level access or higher to upload arbitrary files via zip upload functionality due to missing file type validation. This vulnerability affects all versions up to 2.11.10 and can lead to remote code execution on vulnerable WordPress sites.
💻 Affected Systems
- Modula Image Gallery WordPress Plugin
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Full server compromise via remote code execution, allowing attackers to install backdoors, steal data, deface websites, or pivot to internal networks.
Likely Case
Website defacement, malware injection, data theft, or creation of persistent backdoors for future attacks.
If Mitigated
Limited impact if proper file upload restrictions and web application firewalls are in place, though risk remains elevated.
🎯 Exploit Status
Exploitation requires authenticated access and knowledge of plugin functionality. No public exploit code available at time of analysis.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Version 2.11.11 or later
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find Modula Image Gallery. 4. Click 'Update Now' if available. 5. Alternatively, download latest version from WordPress repository and manually update.
🔧 Temporary Workarounds
Disable Plugin
allTemporarily disable the Modula Image Gallery plugin until patched
Restrict User Roles
allRemove Author-level access from untrusted users and implement least privilege
🧯 If You Can't Patch
- Implement web application firewall (WAF) rules to block malicious file uploads
- Disable zip upload functionality via .htaccess or server configuration
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Plugins > Modula Image Gallery > Version. If version is 2.11.10 or lower, system is vulnerable.Check Version:
wp plugin list --name=modula-best-grid-gallery --field=versionVerify Fix Applied:
Verify plugin version is 2.11.11 or higher in WordPress admin panel.📡 Detection & Monitoring
Log Indicators:
- Unusual file uploads to /wp-content/uploads/modula/
- PHP or executable files in gallery upload directories
- Multiple failed login attempts followed by successful Author-level login
Network Indicators:
- POST requests to /wp-admin/admin-ajax.php with action=modula_upload_zip
- Unusual outbound connections from web server
SIEM Query:
source="web_logs" AND (uri="/wp-admin/admin-ajax.php" AND parameters.action="modula_upload_zip")