CVE-2019-14746
📋 TL;DR
CVE-2019-14746 is a critical code injection vulnerability in KuaiFanCMS 5.0 that allows remote attackers to execute arbitrary PHP code via the db_name parameter in install.php. This affects all KuaiFanCMS 5.0 installations that haven't been properly secured or patched, potentially giving attackers complete control over affected systems.
💻 Affected Systems
- KuaiFanCMS
📦 What is this software?
Kuaifancms by Kuaifan
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with remote code execution leading to data theft, ransomware deployment, or creation of persistent backdoors.
Likely Case
Webshell installation allowing unauthorized access, data exfiltration, and lateral movement within the network.
If Mitigated
Limited impact if proper input validation and security controls prevent code execution.
🎯 Exploit Status
Simple HTTP request with PHP code in db_name parameter followed by config.php request. Public exploit details available in GitHub issues.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown - No official patch from vendor
Vendor Advisory: None available
Restart Required: No
Instructions:
1. Remove install.php file after installation
2. Manually sanitize input validation in affected files
3. Consider migrating to alternative CMS if no official patch available
🔧 Temporary Workarounds
Remove install.php
allDelete or restrict access to install.php file after installation
rm /path/to/kuaifancms/install.php
Input validation hardening
allAdd input sanitization to db_name parameter handling
🧯 If You Can't Patch
- Implement web application firewall (WAF) rules to block eval() and PHP code in parameters
- Network segmentation to isolate KuaiFanCMS from critical systems
🔍 How to Verify
Check if Vulnerable:
Check if install.php exists and is accessible via web browser. Test with harmless payload like '<?php echo "test"; ?>' in db_name parameter.Check Version:
Check CMS version in configuration files or admin panelVerify Fix Applied:
Confirm install.php is removed or inaccessible. Test exploitation attempts fail.📡 Detection & Monitoring
Log Indicators:
- HTTP requests to install.php with PHP code in parameters
- Unexpected eval() or system() calls in web server logs
Network Indicators:
- POST/GET requests containing PHP code patterns to install.php
SIEM Query:
web.url:*install.php* AND (web.param:*<?php* OR web.param:*eval(* OR web.param:*system(*)