CVE-2023-51048
📋 TL;DR
S-CMS v5.0 contains a SQL injection vulnerability in the A_newsauth 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, privilege escalation to admin, and potential server takeover via SQL injection to RCE chain.
Likely Case
Unauthenticated attackers extracting sensitive data (user credentials, personal information), modifying website content, or gaining administrative access to the CMS.
If Mitigated
Limited impact with proper input validation, parameterized queries, and WAF rules blocking SQL injection patterns.
🎯 Exploit Status
SQL injection via GET/POST parameter is straightforward to exploit with common SQL injection tools. The vulnerability is in an admin endpoint but appears accessible without authentication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: No
Instructions:
1. Check for official patch from S-CMS developers
2. If patch available, download and apply following vendor instructions
3. Test functionality after patching
4. Monitor for any issues
🔧 Temporary Workarounds
Input Validation and Sanitization
allImplement strict input validation for the A_newsauth parameter to only accept expected values
WAF Rule Implementation
allDeploy web application firewall rules to block SQL injection patterns targeting /admin/ajax.php
🧯 If You Can't Patch
- Implement network segmentation to restrict access to /admin/ajax.php endpoint
- Deploy database monitoring to detect unusual SQL queries and implement rate limiting
🔍 How to Verify
Check if Vulnerable:
Test the /admin/ajax.php endpoint with SQL injection payloads in the A_newsauth parameter (e.g., ' OR '1'='1)Check Version:
Check S-CMS version in admin panel or configuration filesVerify Fix Applied:
Retest with SQL injection payloads after implementing fixes to confirm they're blocked📡 Detection & Monitoring
Log Indicators:
- Unusual SQL queries in database logs
- Multiple requests to /admin/ajax.php with suspicious parameters
- Error messages containing SQL syntax
Network Indicators:
- HTTP requests to /admin/ajax.php with SQL keywords in parameters
- Unusual traffic patterns to admin endpoints
SIEM Query:
source="web_logs" AND uri="/admin/ajax.php" AND (param="A_newsauth" AND value CONTAINS "OR" OR value CONTAINS "UNION" OR value CONTAINS "SELECT")