CVE-2020-20413
📋 TL;DR
This SQL injection vulnerability in WUZHICMS v4.1.0 allows remote attackers to execute arbitrary SQL commands through the checktitle() function in admin/content.php. Attackers can potentially access, modify, or delete database content. All users running WUZHICMS v4.1.0 are affected.
💻 Affected Systems
- WUZHICMS
📦 What is this software?
Wuzhicms by Wuzhicms
⚠️ Risk & Real-World Impact
Worst Case
Complete database compromise leading to data theft, data destruction, or remote code execution via database functions.
Likely Case
Unauthorized data access, privilege escalation, or database manipulation leading to site defacement or data exfiltration.
If Mitigated
Limited impact with proper input validation and parameterized queries preventing SQL injection.
🎯 Exploit Status
Exploitation requires access to the admin interface, but SQL injection payloads are well-documented and easy to craft.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: v4.1.1 or later
Vendor Advisory: https://github.com/wuzhicms/wuzhicms/releases
Restart Required: No
Instructions:
1. Backup your database and files. 2. Download latest version from official repository. 3. Replace affected files (especially admin/content.php). 4. Test functionality.
🔧 Temporary Workarounds
Input Validation Filter
allAdd input validation to sanitize title parameter before processing
Modify admin/content.php to add parameterized queries or input filtering for checktitle() function
Access Restriction
allRestrict access to admin interface to trusted IP addresses only
Add .htaccess rules or firewall rules to limit admin access
🧯 If You Can't Patch
- Implement web application firewall (WAF) with SQL injection rules
- Disable or restrict access to admin/content.php if not needed
🔍 How to Verify
Check if Vulnerable:
Check if running WUZHICMS v4.1.0 and review admin/content.php for lack of parameterized queries in checktitle() functionCheck Version:
Check version.txt file in WUZHICMS root directory or review admin panel version informationVerify Fix Applied:
Verify version is v4.1.1 or later and check that admin/content.php uses prepared statements or proper input validation📡 Detection & Monitoring
Log Indicators:
- Unusual SQL queries in database logs
- Multiple failed login attempts to admin interface
- Suspicious POST requests to admin/content.php
Network Indicators:
- SQL injection patterns in HTTP requests
- Unusual database connection patterns from web server
SIEM Query:
source="web_logs" AND (uri="/admin/content.php" AND (request CONTAINS "UNION" OR request CONTAINS "SELECT" OR request CONTAINS "INSERT"))