CVE-2025-4543
📋 TL;DR
This critical SQL injection vulnerability in LyLme Spage 2.1 allows remote attackers to execute arbitrary SQL commands via the 'sort' parameter in admin/ajax_link.php. Attackers can potentially read, modify, or delete database content. All users running LyLme Spage 2.1 with the vulnerable file accessible are affected.
💻 Affected Systems
- LyLme Spage
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete database compromise leading to data theft, data destruction, or full system takeover via SQL injection to RCE chaining
Likely Case
Unauthorized database access allowing data exfiltration, privilege escalation, or application compromise
If Mitigated
Limited impact with proper input validation, parameterized queries, and database permissions restricting damage
🎯 Exploit Status
Public proof-of-concept available. Simple parameter manipulation required. No authentication needed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None found
Restart Required: No
Instructions:
No official patch available. Consider workarounds or migrating to alternative software.
🔧 Temporary Workarounds
Input Validation and Sanitization
allAdd strict input validation for the 'sort' parameter in admin/ajax_link.php
Edit admin/ajax_link.php to validate 'sort' parameter accepts only expected values
File Access Restriction
allRestrict access to admin/ajax_link.php via web server configuration
Add 'Deny from all' in .htaccess for admin/ajax_link.php (Apache)
Use nginx location block to deny access to the file
🧯 If You Can't Patch
- Implement Web Application Firewall (WAF) with SQL injection rules
- Restrict database user permissions to minimum required
🔍 How to Verify
Check if Vulnerable:
Check if admin/ajax_link.php exists and is accessible. Test with SQL injection payloads in 'sort' parameter.Check Version:
Check LyLme Spage version in configuration files or admin panelVerify Fix Applied:
Test with SQL injection payloads after applying workarounds. Verify no SQL errors or unexpected behavior.📡 Detection & Monitoring
Log Indicators:
- SQL syntax errors in web logs
- Unusual database queries from web application
- Multiple requests to admin/ajax_link.php with suspicious parameters
Network Indicators:
- HTTP requests containing SQL keywords in 'sort' parameter
- Abnormal traffic patterns to admin/ajax_link.php
SIEM Query:
web.url="*admin/ajax_link.php*" AND (web.param.sort="*' OR *" OR web.param.sort="*;*" OR web.param.sort="*--*" OR web.param.sort="*UNION*" OR web.param.sort="*SELECT*" OR web.param.sort="*INSERT*" OR web.param.sort="*UPDATE*" OR web.param.sort="*DELETE*")