CVE-2025-51504
📋 TL;DR
Microweber CMS 2.0 contains a stored cross-site scripting (XSS) vulnerability in the profile page's last name field. This allows attackers to inject malicious scripts that execute when other users view affected profiles. All Microweber CMS 2.0 installations using the vulnerable profile functionality are affected.
💻 Affected Systems
- Microweber CMS
📦 What is this software?
Microweber by Microweber
⚠️ Risk & Real-World Impact
Worst Case
Attackers could steal administrator session cookies, perform actions as authenticated users, deface websites, or redirect users to malicious sites.
Likely Case
Attackers inject malicious scripts to steal user session data or credentials from visitors viewing compromised profiles.
If Mitigated
With proper input validation and output encoding, malicious scripts are neutralized before execution.
🎯 Exploit Status
Exploitation requires ability to modify profile data (typically authenticated access). Public proof-of-concept demonstrates the vulnerability.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Unknown
Restart Required: No
Instructions:
1. Monitor Microweber security advisories for official patch. 2. Apply patch when available. 3. Test in development environment before production deployment.
🔧 Temporary Workarounds
Input Validation and Sanitization
allImplement server-side validation and HTML encoding for all user input in profile fields.
Content Security Policy
allImplement strict CSP headers to prevent script execution from untrusted sources.
Content-Security-Policy: default-src 'self'; script-src 'self'
🧯 If You Can't Patch
- Disable user profile functionality or restrict profile editing to trusted users only.
- Implement web application firewall (WAF) rules to block XSS payloads in profile data.
🔍 How to Verify
Check if Vulnerable:
Test by entering XSS payloads like <script>alert('XSS')</script> in the last name field of user profiles and check if script executes when viewing the profile.Check Version:
Check Microweber version in admin panel or via composer show microweber/microweberVerify Fix Applied:
Attempt the same XSS payloads after implementing fixes; scripts should not execute and should be displayed as plain text.📡 Detection & Monitoring
Log Indicators:
- Unusual profile updates with script tags or JavaScript code in last name field
- Multiple failed XSS attempts in user input logs
Network Indicators:
- Outbound connections to suspicious domains from profile pages
- Unexpected script loads in profile page responses
SIEM Query:
source="web_logs" AND ("<script" OR "javascript:" OR "onerror=" OR "onload=") AND uri="/projects/profile"