CVE-2020-23973
📋 TL;DR
This vulnerability allows attackers to execute arbitrary SQL commands through the 'id' parameter in team.php, player.php, and club.php files in KandNconcepts Club CMS. This can lead to data theft, modification, or deletion. All users running versions 1.1 or 1.2 of this CMS are affected.
💻 Affected Systems
- KandNconcepts Club CMS
📦 What is this software?
Kandnconcepts Club Cms by Kandnconcepts Club Cms Project
Kandnconcepts Club Cms by Kandnconcepts Club Cms Project
⚠️ Risk & Real-World Impact
Worst Case
Complete database compromise including administrative credential theft, data destruction, and potential remote code execution if database permissions allow.
Likely Case
Data exfiltration of user information, session hijacking, and privilege escalation to administrative access.
If Mitigated
Limited impact with proper input validation and database permission restrictions, potentially only read access to non-sensitive data.
🎯 Exploit Status
SQL injection via URL parameters requires minimal technical skill to exploit.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Unknown
Restart Required: No
Instructions:
No official patch available. Consider migrating to alternative software or implementing workarounds.
🔧 Temporary Workarounds
Input Validation Filter
allAdd server-side validation to ensure 'id' parameter contains only numeric values
Modify team.php, player.php, and club.php to validate $_GET['id'] with is_numeric() or filter_var()
Web Application Firewall Rule
allBlock SQL injection patterns in requests to vulnerable endpoints
Add WAF rule: deny requests containing SQL keywords (SELECT, UNION, etc.) in team.php, player.php, club.php parameters
🧯 If You Can't Patch
- Isolate the CMS instance behind a reverse proxy with strict input filtering
- Implement network segmentation to limit database access from the CMS server
🔍 How to Verify
Check if Vulnerable:
Test by appending SQL injection payloads to team.php?id=, player.php?id=, or club.php?id= parametersCheck Version:
Check CMS version in admin panel or readme filesVerify Fix Applied:
Attempt SQL injection tests after implementing workarounds; successful fixes should return error pages or sanitized responses📡 Detection & Monitoring
Log Indicators:
- Unusual SQL errors in application logs
- Multiple failed login attempts from single IP
- Requests with SQL keywords in URL parameters
Network Indicators:
- Unusual database connection patterns from web server
- Large data exfiltration from database port
SIEM Query:
source="web_logs" AND (url="*team.php*" OR url="*player.php*" OR url="*club.php*") AND (param="*SELECT*" OR param="*UNION*" OR param="*OR 1=1*")