CVE-2024-7705
📋 TL;DR
This vulnerability allows remote attackers to upload arbitrary files to Fujian mwcms 1.0.0 systems via the image upload function. Attackers can exploit this to upload malicious files like webshells, potentially gaining unauthorized access or control. All systems running the vulnerable version with the upload feature accessible are affected.
💻 Affected Systems
- Fujian mwcms
📦 What is this software?
Mwcms by Mainwww
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise via webshell upload leading to data theft, ransomware deployment, or use as attack platform
Likely Case
Unauthorized file upload leading to webshell installation and limited server access
If Mitigated
File upload attempts blocked or sanitized, preventing malicious file execution
🎯 Exploit Status
Public exploit available, requires only web access to upload endpoint
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None available
Restart Required: No
Instructions:
No official patch available. Vendor did not respond to disclosure. Consider alternative CMS or implement workarounds.
🔧 Temporary Workarounds
Disable upload functionality
allRemove or restrict access to /uploadeditor.html endpoint
# Web server configuration to block access to vulnerable endpoint
# Example for Apache: RewriteRule ^/uploadeditor\.html - [F]
# Example for Nginx: location = /uploadeditor.html { deny all; }
Implement file upload restrictions
allAdd server-side validation for file types, extensions, and content
# Modify upload handling code to validate:
# 1. File extension against whitelist
# 2. MIME type verification
# 3. File content scanning
# 4. Size limits
🧯 If You Can't Patch
- Implement WAF rules to block malicious upload patterns
- Isolate affected system in network segment with strict egress filtering
🔍 How to Verify
Check if Vulnerable:
Test if /uploadeditor.html?action=uploadimage accepts non-image files without proper validationCheck Version:
Check CMS version in admin panel or configuration filesVerify Fix Applied:
Attempt to upload malicious file types and verify they are rejected📡 Detection & Monitoring
Log Indicators:
- Unusual file uploads to /uploadeditor.html
- Uploads of non-image file types
- Multiple failed upload attempts
Network Indicators:
- POST requests to /uploadeditor.html with suspicious file contents
- Traffic patterns indicating file upload exploitation
SIEM Query:
web.url:*uploadeditor.html AND (http.method:POST OR file.extension:(php|asp|jsp|exe))