CVE-2023-51052
📋 TL;DR
S-CMS v5.0 contains a SQL injection vulnerability in the A_formauth parameter at /admin/ajax.php that allows attackers to execute arbitrary SQL commands. This affects all installations of S-CMS v5.0, potentially compromising the entire database and application. Attackers can exploit this to steal sensitive data, modify content, or gain administrative access.
💻 Affected Systems
- S-CMS
📦 What is this software?
S Cms by S Cms
⚠️ Risk & Real-World Impact
Worst Case
Complete database compromise leading to data theft, website defacement, and full system takeover through privilege escalation.
Likely Case
Unauthorized data extraction from the database, including user credentials, sensitive content, and configuration information.
If Mitigated
Limited impact with proper input validation and database permissions, potentially only allowing data viewing without modification.
🎯 Exploit Status
The vulnerability is in an admin endpoint but appears to be accessible without authentication. SQL injection is well-understood with many automated tools available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: No
Instructions:
No official patch available. Consider upgrading to a newer version if available, or implement workarounds.
🔧 Temporary Workarounds
Input Validation and Sanitization
allImplement proper input validation and parameterized queries for the A_formauth parameter in /admin/ajax.php
Modify /admin/ajax.php to use prepared statements with parameterized queries for database operations
Web Application Firewall (WAF)
allDeploy a WAF with SQL injection protection rules to block exploitation attempts
Configure WAF rules to block SQL injection patterns targeting /admin/ajax.php
🧯 If You Can't Patch
- Restrict access to /admin/ajax.php using IP whitelisting or authentication requirements
- Implement database-level protections with minimal necessary permissions for the application user
🔍 How to Verify
Check if Vulnerable:
Test the /admin/ajax.php endpoint with SQL injection payloads in the A_formauth parameter and observe database errors or unexpected responses.Check Version:
Check the S-CMS version in the admin panel or configuration filesVerify Fix Applied:
After implementing fixes, test with the same SQL injection payloads and verify they are properly rejected or sanitized without database errors.📡 Detection & Monitoring
Log Indicators:
- Unusual SQL errors in application logs
- Multiple requests to /admin/ajax.php with SQL keywords in parameters
- Database query errors containing user input
Network Indicators:
- HTTP requests to /admin/ajax.php containing SQL injection patterns in parameters
- Unusual database connection patterns from the web server
SIEM Query:
source="web_logs" AND uri_path="/admin/ajax.php" AND (query_string CONTAINS "UNION" OR query_string CONTAINS "SELECT" OR query_string CONTAINS "OR 1=1")