CVE-2025-51501
📋 TL;DR
This reflected XSS vulnerability in Microweber CMS 2.0 allows attackers to inject malicious JavaScript via the id parameter in the live_edit.module_settings API endpoint. When exploited, this can lead to session hijacking, credential theft, or unauthorized actions in the context of the victim's browser. Administrators and users accessing the vulnerable endpoint are primarily affected.
💻 Affected Systems
- Microweber CMS
📦 What is this software?
Microweber by Microweber
⚠️ Risk & Real-World Impact
Worst Case
Attacker steals admin session cookies, gains full administrative access to the CMS, installs backdoors, defaces websites, or exfiltrates sensitive data.
Likely Case
Attacker performs session hijacking of logged-in users, steals credentials via phishing, or redirects users to malicious sites.
If Mitigated
With proper input validation and output encoding, the malicious script is neutralized, preventing execution.
🎯 Exploit Status
Exploitation requires the attacker to trick a user into clicking a malicious link containing the XSS payload in the id parameter.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check vendor advisory for specific patched version
Vendor Advisory: Not provided in references
Restart Required: No
Instructions:
1. Update Microweber CMS to the latest patched version. 2. Apply vendor-provided security patches for version 2.0. 3. Verify the fix by testing the vulnerable endpoint.
🔧 Temporary Workarounds
Input Validation and Sanitization
allImplement server-side validation to sanitize the id parameter, allowing only alphanumeric characters.
Web Application Firewall (WAF) Rules
allDeploy WAF rules to block requests containing suspicious JavaScript patterns in the id parameter.
🧯 If You Can't Patch
- Restrict access to the live_edit.module_settings endpoint to trusted IP addresses only.
- Implement Content Security Policy (CSP) headers to mitigate XSS impact by restricting script execution sources.
🔍 How to Verify
Check if Vulnerable:
Test the live_edit.module_settings endpoint by injecting a simple XSS payload like <script>alert('XSS')</script> into the id parameter and check if it executes in the browser.Check Version:
Check the CMS version in the admin panel or via the software's version file.Verify Fix Applied:
After patching, repeat the XSS test; the payload should be properly encoded or blocked, with no script execution.📡 Detection & Monitoring
Log Indicators:
- Log entries showing requests to live_edit.module_settings with suspicious id parameter values containing script tags or JavaScript code.
Network Indicators:
- HTTP requests with encoded or obfuscated JavaScript in the id parameter of the vulnerable endpoint.
SIEM Query:
source="web_logs" AND uri="/api/live_edit.module_settings" AND query CONTAINS "<script>"