CVE-2025-2607
📋 TL;DR
This critical vulnerability in LzCMS-LaoZhangBoKeXiTong allows attackers to upload arbitrary files without restrictions via the /admin/upload/upimage.html endpoint. Remote attackers can exploit this to upload malicious files like webshells or malware. All users running affected versions are at risk.
💻 Affected Systems
- phplaozhang LzCMS-LaoZhangBoKeXiTong
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise via webshell upload leading to remote code execution, data theft, and lateral movement within the network.
Likely Case
Attackers upload webshells to gain persistent access, deface websites, or deploy ransomware on vulnerable systems.
If Mitigated
With proper file upload validation and access controls, impact is limited to potential DoS via large file uploads.
🎯 Exploit Status
Exploit requires admin access but is simple to execute once authenticated
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None available
Restart Required: No
Instructions:
No official patch available. Consider upgrading if vendor releases fix or implement workarounds.
🔧 Temporary Workarounds
Restrict File Upload Endpoint
allBlock or restrict access to /admin/upload/upimage.html via web server configuration
# Apache: <Location /admin/upload/upimage.html> Require all denied </Location>
# Nginx: location /admin/upload/upimage.html { deny all; }
Implement File Upload Validation
allAdd server-side validation for file types, extensions, and content
# Add to upload script: validate file extension, MIME type, and scan for malicious content
🧯 If You Can't Patch
- Implement strict access controls to admin interface and monitor for unauthorized access
- Deploy WAF rules to block malicious file upload patterns and monitor upload directories
🔍 How to Verify
Check if Vulnerable:
Check if version is ≤1.1.4 and test if /admin/upload/upimage.html accepts unrestricted file uploadsCheck Version:
Check CMS configuration files or database for version informationVerify Fix Applied:
Test that file upload endpoint properly validates file types and extensions📡 Detection & Monitoring
Log Indicators:
- Unusual file uploads to /admin/upload/upimage.html
- Uploads of executable files (php, jsp, asp)
- Multiple failed upload attempts
Network Indicators:
- POST requests to /admin/upload/upimage.html with suspicious file names
- Traffic patterns indicating webshell communication
SIEM Query:
source="web_logs" AND uri="/admin/upload/upimage.html" AND (file_extension="php" OR file_extension="jsp" OR file_extension="asp")