CVE-2025-3563
📋 TL;DR
This critical vulnerability in WuzhiCMS 4.1 allows remote attackers to execute arbitrary code through code injection in the Setting Handler component. Attackers can exploit this by manipulating the 'Setting' parameter in the attachment management interface. All systems running the affected version are vulnerable to remote compromise.
💻 Affected Systems
- WuzhiCMS
📦 What is this software?
Wuzhicms by Wuzhicms
⚠️ Risk & Real-World Impact
Worst Case
Complete system takeover with remote code execution, data theft, and lateral movement within the network.
Likely Case
Webshell deployment leading to data exfiltration, defacement, or use as a foothold for further attacks.
If Mitigated
Limited impact if proper WAF rules block the attack pattern and system is isolated.
🎯 Exploit Status
Exploit details are publicly available and the attack requires minimal technical skill to execute.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None available - vendor did not respond to disclosure
Restart Required: No
Instructions:
No official patch available. Consider upgrading to a different CMS or implementing workarounds.
🔧 Temporary Workarounds
Disable vulnerable endpoint
allBlock access to the vulnerable attachment management interface
# Add to .htaccess for Apache:
RewriteRule ^index\.php\?m=attachment&f=index&_su=wuzhicms&v=set&submit=1 - [F,L]
# Add to nginx config:
location ~* /index\.php\?m=attachment&f=index&_su=wuzhicms&v=set&submit=1 { deny all; }
Input validation hardening
allAdd input sanitization for the Setting parameter
# In /index.php or relevant controller, add:
$setting = preg_replace('/[^a-zA-Z0-9_\-]/', '', $_POST['Setting']);
🧯 If You Can't Patch
- Implement strict WAF rules to block requests containing suspicious patterns in the Setting parameter
- Isolate the WuzhiCMS instance in a DMZ with restricted outbound network access
🔍 How to Verify
Check if Vulnerable:
Check if your WuzhiCMS version is 4.1 by examining the CMS configuration or admin panel.Check Version:
Check config files or database for version information, or look at admin panel footer.Verify Fix Applied:
Test if the vulnerable endpoint (/index.php?m=attachment&f=index&_su=wuzhicms&v=set&submit=1) is accessible and accepts Setting parameter.📡 Detection & Monitoring
Log Indicators:
- POST requests to /index.php with m=attachment&f=index&_su=wuzhicms&v=set&submit=1 containing unusual Setting parameter values
- Web server logs showing code execution patterns like system(), eval(), or base64_decode()
Network Indicators:
- Unusual outbound connections from the web server
- Traffic patterns matching known exploit payloads
SIEM Query:
source="web_logs" AND uri="*index.php*" AND query="*m=attachment*f=index*_su=wuzhicms*v=set*submit=1*" AND (param="*Setting=*system(*" OR param="*Setting=*eval(*" OR param="*Setting=*base64_decode(*")