CVE-2025-54540
📋 TL;DR
QuickCMS admin panel is vulnerable to reflected cross-site scripting (XSS) via the sSort parameter. An attacker can craft malicious URLs that execute arbitrary JavaScript in victims' browsers when opened. This affects QuickCMS administrators who access the vulnerable admin panel.
💻 Affected Systems
- QuickCMS
📦 What is this software?
Quick Cms by Opensolution
⚠️ Risk & Real-World Impact
Worst Case
Administrator account compromise leading to full CMS takeover, data theft, or malware deployment
Likely Case
Session hijacking, credential theft, or unauthorized admin actions via social engineering
If Mitigated
Limited impact if proper input validation and output encoding are implemented
🎯 Exploit Status
Exploitation requires admin to click malicious link; no authentication bypass needed beyond admin access
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None provided
Restart Required: No
Instructions:
No official patch available. Consider upgrading to latest version if available or implementing workarounds.
🔧 Temporary Workarounds
Input Validation Filter
allImplement server-side validation to sanitize sSort parameter values
Modify admin panel code to validate sSort parameter contains only allowed characters
Output Encoding
allApply proper HTML encoding to sSort parameter before rendering in admin interface
Implement HTML entity encoding for all user-controlled parameters in admin panel
🧯 If You Can't Patch
- Restrict admin panel access to trusted IP addresses only
- Implement Content Security Policy (CSP) headers to block inline JavaScript execution
🔍 How to Verify
Check if Vulnerable:
Test admin panel with payload: <script>alert('XSS')</script> in sSort parameterCheck Version:
Check QuickCMS version in admin panel or configuration filesVerify Fix Applied:
Verify payload no longer executes and appears as encoded text in response📡 Detection & Monitoring
Log Indicators:
- Unusual sSort parameter values containing script tags or JavaScript in admin panel logs
Network Indicators:
- HTTP requests to admin panel with suspicious sSort parameter values
SIEM Query:
web.url:*sSort=*<script* OR web.url:*sSort=*javascript:*