CVE-2024-6386
📋 TL;DR
The WPML WordPress plugin has a critical Server-Side Template Injection vulnerability that allows authenticated attackers with Contributor-level access or higher to execute arbitrary code on the server. This affects all WPML versions up to 4.6.12. Attackers can potentially take full control of affected WordPress sites.
💻 Affected Systems
- WPML (WordPress Multilingual Plugin)
📦 What is this software?
Wpml by Wpml
⚠️ Risk & Real-World Impact
Worst Case
Complete server compromise allowing attackers to install backdoors, steal sensitive data, deface websites, or use the server for further attacks.
Likely Case
Website defacement, data theft, malware installation, or cryptocurrency mining due to the relatively low privilege requirement for exploitation.
If Mitigated
Limited impact if proper access controls and network segmentation are in place, though the vulnerability still presents significant risk.
🎯 Exploit Status
Exploitation requires authenticated access but only at Contributor level, which is relatively easy to obtain. Public proof-of-concept exists.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 4.6.13 and later
Vendor Advisory: https://wpml.org/
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find WPML plugin. 4. Click 'Update Now' if update available. 5. If no update shows, download version 4.6.13+ from wpml.org and manually update.
🔧 Temporary Workarounds
Temporary Plugin Deactivation
allDisable WPML plugin until patched
Restrict User Registration
allDisable new user registration to prevent attackers from obtaining Contributor accounts
🧯 If You Can't Patch
- Implement strict access controls and review all user accounts with Contributor+ privileges
- Deploy web application firewall rules to detect and block SSTI patterns
🔍 How to Verify
Check if Vulnerable:
Check WPML plugin version in WordPress admin panel under Plugins > Installed PluginsCheck Version:
wp plugin list --name=wpml --field=version (if WP-CLI installed)Verify Fix Applied:
Verify WPML version is 4.6.13 or higher after update📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to wpml endpoints
- Twig template rendering errors
- Unexpected process execution from web server
Network Indicators:
- Outbound connections from web server to suspicious IPs
- Unusual payloads in HTTP requests containing Twig syntax
SIEM Query:
web.url:*wpml* AND (web.method:POST OR web.status:500) AND (web.uri:*twig* OR web.uri:*render*)