CVE-2025-40728
📋 TL;DR
An authenticated SQL injection vulnerability in Customer Support System v1.0 allows attackers to manipulate database queries through the id parameter in the /customer_support/manage_user.php endpoint. This enables unauthorized database operations including data retrieval, modification, and deletion. Organizations using this specific software version are affected.
💻 Affected Systems
- Customer Support System
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete database compromise leading to data theft, destruction, or ransomware deployment across all customer support data.
Likely Case
Unauthorized access to sensitive customer information, user account manipulation, and potential privilege escalation.
If Mitigated
Limited impact due to proper input validation, parameterized queries, and database permission restrictions.
🎯 Exploit Status
SQL injection is well-understood with many automated tools available. Requires authenticated access but could be combined with credential theft or default credentials.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://www.incibe.es/en/incibe-cert/notices/aviso/multiple-vulnerabilities-customer-support-system
Restart Required: No
Instructions:
1. Check vendor website for updated version. 2. If no patch available, implement workarounds. 3. Consider replacing with supported software.
🔧 Temporary Workarounds
Web Application Firewall (WAF)
allDeploy WAF with SQL injection rules to block malicious requests
Input Validation Filter
allAdd server-side validation to restrict id parameter to numeric values only
<?php
if (!is_numeric($_GET['id'])) {
http_response_code(400);
exit('Invalid parameter');
}
?>
🧯 If You Can't Patch
- Isolate the system behind strict network segmentation with limited database access
- Implement comprehensive monitoring and alerting for unusual database queries
🔍 How to Verify
Check if Vulnerable:
Test the /customer_support/manage_user.php endpoint with SQL injection payloads in the id parameter (e.g., id=1' OR '1'='1)Check Version:
Check application version in admin panel or configuration filesVerify Fix Applied:
Verify that SQL injection payloads no longer execute and return appropriate error responses📡 Detection & Monitoring
Log Indicators:
- Unusual SQL syntax in access logs
- Multiple failed authentication attempts followed by SQL payloads
- Database error messages containing SQL fragments
Network Indicators:
- HTTP requests with SQL keywords in parameters
- Unusual database query patterns from web server
SIEM Query:
source="web_logs" AND (url="*manage_user.php*" AND (param="*id=*'*" OR param="*id=*%27*" OR param="*id=*UNION*" OR param="*id=*SELECT*"))