CVE-2025-50233
📋 TL;DR
This vulnerability in QCMS 6.0.5 allows authenticated users to perform directory traversal attacks by manipulating the 'Name' parameter in the backend template editor. Attackers can read arbitrary files from the server, potentially exposing sensitive system files, configuration data, or PHP source code. Only systems running QCMS version 6.0.5 with authenticated user access are affected.
💻 Affected Systems
- QCMS
📦 What is this software?
Qcms by Q Cms
⚠️ Risk & Real-World Impact
Worst Case
Complete server compromise through exposure of configuration files containing database credentials, API keys, or other secrets that could lead to further attacks.
Likely Case
Exfiltration of sensitive configuration files, source code, or system information that could be used for reconnaissance or credential harvesting.
If Mitigated
Limited exposure of non-critical files if proper file permissions and web server configurations restrict access to sensitive directories.
🎯 Exploit Status
Exploitation requires authenticated access and knowledge of the vulnerable parameter. Directory traversal techniques are well-documented and relatively straightforward to implement.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 6.0.6 or later
Vendor Advisory: https://github.com/xiaoyangsec/cve/blob/main/README.md
Restart Required: No
Instructions:
1. Backup your QCMS installation and database. 2. Download QCMS version 6.0.6 or later from the official repository. 3. Replace the vulnerable files with the patched version. 4. Verify the fix by testing the template editor functionality.
🔧 Temporary Workarounds
Input Validation Enhancement
allAdd server-side validation to sanitize the 'Name' parameter and prevent directory traversal sequences.
Modify the template editor code to filter out '../', '..\', and other traversal patterns from the Name parameter
Access Restriction
allRestrict access to the template editor functionality to only trusted administrators.
Implement additional authentication checks or IP whitelisting for the template editor interface
🧯 If You Can't Patch
- Implement strict file permission controls to limit what files the web server user can read
- Deploy a web application firewall (WAF) with rules to detect and block directory traversal attempts
🔍 How to Verify
Check if Vulnerable:
Test if authenticated users can access files outside the template directory by manipulating the Name parameter with traversal sequences like '../../etc/passwd'Check Version:
Check the QCMS admin panel or version file for current version informationVerify Fix Applied:
Attempt the same directory traversal attack after patching; successful fix should return an error or sanitized output📡 Detection & Monitoring
Log Indicators:
- Unusual file access patterns in web server logs
- Multiple failed attempts to access files with traversal sequences in the Name parameter
Network Indicators:
- HTTP requests containing directory traversal sequences in the Name parameter
- Unusual file downloads from the template editor endpoint
SIEM Query:
web.url:*template* AND (web.param.name:*../* OR web.param.name:*..\*)