CVE-2025-8522
📋 TL;DR
This critical vulnerability in Vvvebjs allows remote attackers to perform path traversal attacks via the 'File' parameter in /save.php. Attackers can potentially read, write, or delete files outside the intended directory. All users running Vvvebjs up to version 2.0.4 are affected.
💻 Affected Systems
- givanz Vvvebjs
📦 What is this software?
Vvvebjs by Vvveb
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise, data theft, or ransomware deployment
Likely Case
Unauthorized file read/write operations, potentially exposing sensitive configuration files or user data
If Mitigated
Limited to directory traversal attempts that are blocked by proper input validation
🎯 Exploit Status
Exploit details are publicly disclosed in GitHub issues, though exploitation requires specific conditions
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.0.5 or later
Vendor Advisory: https://github.com/givanz/VvvebJs/issues/409
Restart Required: No
Instructions:
1. Update Vvvebjs to version 2.0.5 or later. 2. Verify the /save.php file has proper input validation. 3. Test the application functionality after update.
🔧 Temporary Workarounds
Input Validation Filter
allAdd input validation to reject path traversal sequences in the File parameter
Implement validation to reject '../', '..\\', and similar sequences in file paths
Access Restriction
allRestrict access to /save.php endpoint using web server rules or authentication
Add authentication requirement or IP whitelisting for /save.php endpoint
🧯 If You Can't Patch
- Implement WAF rules to block path traversal patterns in requests to /save.php
- Monitor file system access logs for unusual patterns and implement strict file permission controls
🔍 How to Verify
Check if Vulnerable:
Check if running Vvvebjs version 2.0.4 or earlier and if /save.php endpoint is accessibleCheck Version:
Check package.json for Vvvebjs version or review application documentationVerify Fix Applied:
Test that path traversal attempts (e.g., '../../etc/passwd') are properly rejected📡 Detection & Monitoring
Log Indicators:
- Unusual file access patterns in application logs
- Multiple failed attempts to access /save.php with traversal sequences
Network Indicators:
- HTTP requests to /save.php containing '../' or similar traversal patterns
SIEM Query:
source="web_logs" AND uri="/save.php" AND (uri="*../*" OR uri="*..\\*")