CVE-2024-31615
📋 TL;DR
ThinkCMF 6.0.9 contains an unrestricted file upload vulnerability in UeditorController.php that allows attackers to upload arbitrary files, including malicious scripts. This affects all ThinkCMF 6.0.9 installations with the vulnerable component enabled. Attackers can exploit this to achieve remote code execution on affected systems.
💻 Affected Systems
- ThinkCMF
📦 What is this software?
Thinkcmf by Thinkcmf
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise via remote code execution, allowing attackers to install backdoors, steal data, pivot to internal networks, or deploy ransomware.
Likely Case
Webshell deployment leading to data exfiltration, credential theft, and lateral movement within the affected environment.
If Mitigated
Limited impact with proper file upload restrictions, web application firewalls, and file system permissions preventing execution of uploaded files.
🎯 Exploit Status
Public proof-of-concept available in Chinese repositories. Exploitation requires minimal technical skill due to simple file upload mechanism.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Unknown
Restart Required: No
Instructions:
No official patch available. Monitor ThinkCMF releases for security updates. Consider upgrading to latest version if available.
🔧 Temporary Workarounds
Disable Ueditor Controller
linuxRemove or disable access to UeditorController.php to prevent exploitation
mv /path/to/UeditorController.php /path/to/UeditorController.php.disabled
chmod 000 /path/to/UeditorController.php
Implement File Upload Restrictions
allAdd server-side validation to restrict file types, extensions, and content
🧯 If You Can't Patch
- Implement web application firewall (WAF) rules to block malicious file upload patterns
- Restrict file system permissions to prevent execution of uploaded files in web directories
🔍 How to Verify
Check if Vulnerable:
Check if UeditorController.php exists and is accessible. Attempt to upload a test file with malicious extension to verify vulnerability.Check Version:
Check ThinkCMF version in configuration files or admin panelVerify Fix Applied:
Verify UeditorController.php is disabled or removed. Test file upload functionality with restricted file types only.📡 Detection & Monitoring
Log Indicators:
- Unusual file upload activity to Ueditor endpoints
- Files with executable extensions (.php, .jsp, .asp) uploaded to upload directories
- Multiple failed upload attempts with suspicious filenames
Network Indicators:
- HTTP POST requests to /UeditorController.php with file upload parameters
- Unusual outbound connections from web server after file upload
SIEM Query:
source="web_logs" AND (uri="/UeditorController.php" OR uri CONTAINS "upload") AND method="POST" AND (file_extension="php" OR file_extension="jsp" OR file_extension="asp")