CVE-2025-54542
📋 TL;DR
QuickCMS transmits user credentials via GET requests instead of POST, exposing passwords and login information in browser history and server logs. This allows attackers with access to the victim's browser history or network traffic to steal credentials and impersonate users. All QuickCMS installations using the vulnerable authentication mechanism are affected.
💻 Affected Systems
- QuickCMS
📦 What is this software?
Quick Cms by Opensolution
⚠️ Risk & Real-World Impact
Worst Case
Attackers gain administrative access to the CMS, potentially compromising the entire website, defacing content, stealing sensitive data, or installing backdoors.
Likely Case
Local attackers (shared computers, public terminals) or those with network access can harvest credentials from browser history or logs, leading to unauthorized user account access.
If Mitigated
With proper network segmentation and access controls, risk is limited to local attackers on the same machine, though credential exposure in logs remains a concern.
🎯 Exploit Status
Exploitation requires access to browser history or network traffic; no authentication needed beyond that access.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None available
Restart Required: No
Instructions:
No official patch available; vendor has not responded to disclosure. Consider workarounds or alternative CMS solutions.
🔧 Temporary Workarounds
Modify Authentication to Use POST
allChange login forms to submit credentials via POST requests instead of GET to prevent exposure in URLs and logs.
Edit QuickCMS login form: change method="GET" to method="POST" in HTML forms
Update server-side authentication scripts to process POST data
Implement HTTPS Enforcement
allForce all traffic to use HTTPS to encrypt credentials in transit, though GET requests in URLs may still be logged.
Configure web server (e.g., Apache, Nginx) to redirect HTTP to HTTPS
Set HSTS headers for browsers
🧯 If You Can't Patch
- Restrict physical and network access to systems running QuickCMS to prevent local attackers from accessing browser history.
- Monitor and regularly purge browser history and server logs containing sensitive GET parameters.
🔍 How to Verify
Check if Vulnerable:
Inspect login form HTML for method="GET" and check if credentials appear in browser address bar or server logs after login.Check Version:
Check QuickCMS version in admin panel or configuration files; command varies by installation.Verify Fix Applied:
After modifications, test login to ensure credentials are sent via POST and do not appear in URLs or logs.📡 Detection & Monitoring
Log Indicators:
- GET requests containing 'password', 'login', or similar parameters in web server access logs
- Unusual login patterns from unexpected IP addresses
Network Indicators:
- Plaintext credentials visible in HTTP GET requests during authentication
SIEM Query:
source="web_server" AND (url="*password=*" OR url="*login=*")