CVE-2025-50234
📋 TL;DR
MCCMS v2.7.0 has a server-side request forgery (SSRF) vulnerability that allows attackers to make the application send requests to internal systems and read local files. This can lead to sensitive data exposure, including configuration files and system information. Any system running the vulnerable MCCMS version is affected.
💻 Affected Systems
- MCCMS
📦 What is this software?
Mccms by Chshcms
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise through file reading leading to credential theft, privilege escalation, or remote code execution via exposed internal services.
Likely Case
Sensitive information leakage including configuration files, logs, and internal service data accessible via SSRF.
If Mitigated
Limited impact with proper network segmentation and input validation, but still poses information disclosure risk.
🎯 Exploit Status
Requires crafting encrypted payloads using the hard-coded key, but no authentication needed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check with vendor for patched version
Vendor Advisory: Not provided in references
Restart Required: No
Instructions:
1. Update to latest MCCMS version from official source. 2. Replace hard-coded encryption key with secure random key. 3. Implement URL validation in geturl() method to block internal addresses and file:// protocol.
🔧 Temporary Workarounds
Input Validation Filter
allAdd validation to block internal IPs and file:// protocol in the vulnerable endpoint
Modify sys/apps/controllers/api/Gf.php to validate URLs before geturl() call
Network Segmentation
allRestrict outbound network access from web server to prevent SSRF exploitation
Configure firewall to block web server from accessing internal networks
🧯 If You Can't Patch
- Implement web application firewall (WAF) rules to block requests containing encrypted pic parameters
- Disable or restrict access to the vulnerable API endpoint (/api/gf)
🔍 How to Verify
Check if Vulnerable:
Check if MCCMS version is 2.7.0 and examine sys/apps/controllers/api/Gf.php for the vulnerable index() methodCheck Version:
Check MCCMS version in configuration files or admin panelVerify Fix Applied:
Verify that URL validation is implemented in geturl() method and hard-coded key is replaced📡 Detection & Monitoring
Log Indicators:
- Unusual requests to /api/gf endpoint with encrypted parameters
- Outbound requests from web server to internal IPs
Network Indicators:
- Web server making requests to 127.0.0.1, localhost, or file:// URLs
SIEM Query:
source="web_logs" AND uri="/api/gf" AND (param="pic" OR contains(uri, "encrypted"))