CVE-2024-25182
📋 TL;DR
VvvebJs 1.7.2 contains an unrestricted file upload vulnerability in save.php that allows attackers to upload arbitrary files, including malicious scripts. This affects all deployments using the vulnerable version of this WYSIWYG editor. Attackers can achieve remote code execution by uploading webshells.
💻 Affected Systems
- givanz VvvebJs
📦 What is this software?
Vvvebjs by Vvveb
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise via remote code execution, data exfiltration, and persistent backdoor installation.
Likely Case
Website defacement, malware distribution, or credential theft via uploaded webshells.
If Mitigated
Limited impact if file uploads are restricted to authenticated users and file types are strictly validated.
🎯 Exploit Status
Simple HTTP POST request with malicious file upload to save.php endpoint.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None found
Restart Required: No
Instructions:
1. Check for updated version from vendor. 2. If no patch, implement workarounds immediately. 3. Remove or restrict access to save.php.
🔧 Temporary Workarounds
Restrict file upload types
allImplement server-side validation to only allow specific safe file extensions.
# In save.php or upload handler, add: $allowed = ['jpg', 'png', 'gif']; $ext = strtolower(pathinfo($filename, PATHINFO_EXTENSION)); if(!in_array($ext, $allowed)) { die('Invalid file type'); }
Disable save.php or restrict access
allBlock access to the vulnerable endpoint via web server configuration.
# Apache: <Location /path/to/save.php> Require all denied </Location>
# Nginx: location ~ /save\.php$ { deny all; }
🧯 If You Can't Patch
- Implement Web Application Firewall (WAF) rules to block malicious file uploads
- Monitor file upload directories for suspicious files and implement file integrity monitoring
🔍 How to Verify
Check if Vulnerable:
Test if save.php accepts file uploads without proper validation by attempting to upload a test file with .php extension.Check Version:
Check VvvebJs version in package.json or composer.json, or examine source files for version markers.Verify Fix Applied:
Attempt to upload a file with malicious extension; should be rejected. Check that save.php is no longer accessible or properly validates files.📡 Detection & Monitoring
Log Indicators:
- POST requests to save.php with unusual file extensions
- File uploads with .php, .phtml, .jsp extensions
- Large number of upload attempts
Network Indicators:
- HTTP POST to /save.php with file uploads
- Unusual traffic patterns to upload endpoints
SIEM Query:
source="web_logs" AND uri="/save.php" AND method="POST" AND (file_extension="php" OR file_extension="phtml" OR file_extension="jsp")