CVE-2024-13319
📋 TL;DR
The Themify Builder WordPress plugin contains a reflected cross-site scripting (XSS) vulnerability that allows unauthenticated attackers to inject malicious scripts via crafted URLs. When users click on malicious links, arbitrary JavaScript executes in their browser context. All WordPress sites using Themify Builder up to version 7.6.5 are affected.
💻 Affected Systems
- Themify Builder WordPress Plugin
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers steal session cookies, perform actions as authenticated users, redirect to phishing sites, or install malware via drive-by downloads.
Likely Case
Session hijacking, credential theft, or defacement of vulnerable pages through script injection.
If Mitigated
Limited impact if users have script blockers, browsers with XSS filters, or clickjacking protection enabled.
🎯 Exploit Status
Exploitation requires user interaction (clicking malicious link). Technical details and proof-of-concept are publicly available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 7.6.6 or later
Vendor Advisory: https://plugins.trac.wordpress.org/changeset/3224684/themify-builder/trunk/themify/themify-admin.php
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find Themify Builder and click 'Update Now'. 4. Verify version is 7.6.6 or higher.
🔧 Temporary Workarounds
Disable Plugin
allTemporarily disable Themify Builder plugin until patched
wp plugin deactivate themify-builder
Web Application Firewall Rule
linuxBlock malicious query parameters containing script tags
ModSecurity rule: SecRule ARGS "<script" "id:1001,phase:2,deny"
🧯 If You Can't Patch
- Implement Content Security Policy (CSP) headers to restrict script execution
- Use browser security extensions or network filtering to block malicious URLs
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Plugins > Themify Builder for version number. If version is 7.6.5 or lower, system is vulnerable.Check Version:
wp plugin get themify-builder --field=versionVerify Fix Applied:
After update, confirm version is 7.6.6 or higher in WordPress admin panel.📡 Detection & Monitoring
Log Indicators:
- HTTP requests with suspicious query parameters containing script tags or JavaScript code
- Multiple 404 errors for Themify Builder endpoints with encoded payloads
Network Indicators:
- Outbound connections to suspicious domains after visiting WordPress pages with query parameters
- Unusual JavaScript execution patterns in browser traffic
SIEM Query:
source="wordpress.log" AND ("themify" AND ("<script" OR "javascript:" OR "onerror="))