CVE-2025-6736
📋 TL;DR
This critical vulnerability in juzaweb CMS 3.4.2 allows unprivileged users to upload new themes via the /admin-cp/theme/install endpoint due to improper authorization. Attackers can exploit this remotely to potentially execute arbitrary code or compromise the CMS installation. All users running juzaweb CMS 3.4.2 with the affected component are vulnerable.
💻 Affected Systems
- juzaweb CMS
📦 What is this software?
Cms by Juzaweb
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise, data theft, and persistent backdoor installation
Likely Case
Unauthorized theme upload allowing malicious code execution within CMS context, potentially leading to website defacement or data exfiltration
If Mitigated
Limited impact with proper network segmentation and strict access controls preventing exploitation attempts
🎯 Exploit Status
Exploit requires authenticated user access but minimal privileges; public disclosure increases weaponization likelihood
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None available
Restart Required: No
Instructions:
No official patch available. Consider upgrading to latest version if available or implementing workarounds.
🔧 Temporary Workarounds
Restrict access to admin-cp directory
allBlock access to the vulnerable endpoint using web server configuration
# Apache: <Location /admin-cp/theme/install> Require all denied </Location>
# Nginx: location /admin-cp/theme/install { deny all; }
Implement strict access controls
allEnsure only authorized administrators can access admin control panel
# Configure proper authentication and authorization in web server
🧯 If You Can't Patch
- Implement network segmentation to isolate juzaweb CMS from critical systems
- Deploy web application firewall (WAF) with rules to block unauthorized theme upload attempts
🔍 How to Verify
Check if Vulnerable:
Check if juzaweb CMS version is 3.4.2 and if /admin-cp/theme/install endpoint is accessibleCheck Version:
Check CMS configuration files or admin panel for version informationVerify Fix Applied:
Test if unauthorized users can access /admin-cp/theme/install endpoint after implementing controls📡 Detection & Monitoring
Log Indicators:
- Unauthorized access attempts to /admin-cp/theme/install
- Theme uploads from non-admin users
- Unusual file upload patterns
Network Indicators:
- HTTP POST requests to /admin-cp/theme/install from unauthorized IPs
- Unusual outbound connections after theme upload
SIEM Query:
source="web_server" AND (uri="/admin-cp/theme/install" OR method="POST" AND uri CONTAINS "theme/install") AND user!="admin"