CVE-2025-15393
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary code on Kohana KodiCMS systems through code injection in the Layout API Endpoint's Save function. It affects all Kohana KodiCMS installations up to version 13.82.135. Attackers can exploit this without authentication to compromise the web application.
💻 Affected Systems
- Kohana KodiCMS
📦 What is this software?
Kodicms by Kodicms Kohana
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise allowing remote code execution, data theft, lateral movement, and persistent backdoor installation.
Likely Case
Web application compromise leading to defacement, data exfiltration, or use as a foothold for further attacks.
If Mitigated
Limited impact if proper input validation and output encoding are implemented, though the vulnerability would still exist.
🎯 Exploit Status
Public exploit disclosure increases likelihood of weaponization. Remote exploitation without authentication makes this particularly dangerous.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None available
Restart Required: No
Instructions:
No official patch available. Consider upgrading to any version beyond 13.82.135 if released, or implement workarounds.
🔧 Temporary Workarounds
Disable Layout API Endpoint
allTemporarily disable or restrict access to the vulnerable Layout API Endpoint to prevent exploitation.
# Modify web server configuration to block access to cms/modules/kodicms/classes/kodicms/model/file.php
# Example for Apache: RewriteRule ^cms/modules/kodicms/classes/kodicms/model/file\.php$ - [F,L]
# Example for Nginx: location ~ /cms/modules/kodicms/classes/kodicms/model/file\.php { deny all; }
Implement Input Validation
allAdd strict input validation and sanitization for the 'content' parameter in the Save function.
# Modify cms/modules/kodicms/classes/kodicms/model/file.php to validate/sanitize input
# Example PHP validation: if (!preg_match('/^[a-zA-Z0-9\s\-_\.]+$/', $content)) { die('Invalid input'); }
🧯 If You Can't Patch
- Implement web application firewall (WAF) rules to block suspicious requests to the Layout API Endpoint.
- Restrict network access to the KodiCMS instance to trusted IP addresses only.
🔍 How to Verify
Check if Vulnerable:
Check if KodiCMS version is 13.82.135 or earlier by examining the application version in admin panel or source code.Check Version:
# Check KodiCMS version via admin panel or examine application files for version informationVerify Fix Applied:
Test if the Layout API Endpoint properly validates input by attempting to submit malicious content and verifying it's rejected.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to cms/modules/kodicms/classes/kodicms/model/file.php with suspicious content parameters
- Unexpected file creation or modification in web directories
- Web server error logs showing code execution attempts
Network Indicators:
- HTTP requests containing code injection patterns (e.g., <?php, eval(), system()) to the vulnerable endpoint
- Unusual outbound connections from the web server
SIEM Query:
source="web_server_logs" AND (url="*cms/modules/kodicms/classes/kodicms/model/file.php*" AND (content="*<?php*" OR content="*eval(*" OR content="*system(*"))