CVE-2023-52047
📋 TL;DR
This CSRF vulnerability in Dedecms v5.7.112 allows attackers to trick authenticated administrators into performing unauthorized actions via the file manager. Attackers can upload malicious files, modify content, or delete files without the admin's knowledge. Only Dedecms installations with the vulnerable version are affected.
💻 Affected Systems
- Dedecms
📦 What is this software?
Dedecms by Dedecms
⚠️ Risk & Real-World Impact
Worst Case
Complete website compromise through malicious file upload leading to remote code execution, data theft, or defacement.
Likely Case
Unauthorized file uploads leading to defacement, malware distribution, or limited data manipulation.
If Mitigated
No impact if proper CSRF protections are implemented and users follow security best practices.
🎯 Exploit Status
Exploit requires social engineering to trick authenticated admin into clicking malicious link. Proof-of-concept available in public repositories.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: v5.7.113 or later
Vendor Advisory: https://github.com/dedecms/DedeCMS/releases
Restart Required: No
Instructions:
1. Backup your current installation. 2. Download the latest version from official Dedecms repository. 3. Replace vulnerable files with patched versions. 4. Verify functionality.
🔧 Temporary Workarounds
Implement CSRF Tokens
allAdd CSRF protection tokens to file manager forms
Modify PHP files to include CSRF token validation
Restrict Admin Access
allLimit admin panel access to trusted IP addresses only
Add IP whitelisting to .htaccess or web server config
🧯 If You Can't Patch
- Implement strict SameSite cookie policies and Content Security Policy headers
- Require re-authentication for sensitive file operations and monitor admin activity logs
🔍 How to Verify
Check if Vulnerable:
Check Dedecms version in admin panel or by examining version files in installation directoryCheck Version:
Check /data/admin/ver.txt or admin panel version displayVerify Fix Applied:
Verify version is v5.7.113 or later and test CSRF protection on file upload forms📡 Detection & Monitoring
Log Indicators:
- Unexpected file uploads from admin sessions
- Multiple failed CSRF token validations
- Admin actions from unusual IP addresses
Network Indicators:
- POST requests to file manager without proper referrer headers
- Unusual file upload patterns
SIEM Query:
source="web_logs" AND (uri="/dede/file_manage.php" OR uri="/dede/upload.php") AND (referrer NOT CONTAINS expected_domain OR csrf_token="")