CVE-2025-52036
📋 TL;DR
This stored cross-site scripting (XSS) vulnerability in NotesCMS allows attackers to inject malicious scripts into category service descriptions via the /index.php?route=categories page. When users view these manipulated categories, the scripts execute in their browsers, potentially stealing session cookies or performing unauthorized actions. All NotesCMS instances using vulnerable versions are affected.
💻 Affected Systems
- NotesCMS
📦 What is this software?
Notescms by Exe System
⚠️ Risk & Real-World Impact
Worst Case
Attackers could steal administrator session cookies, take over the CMS, deface websites, or redirect users to malicious sites, potentially leading to complete system compromise.
Likely Case
Attackers inject malicious JavaScript to steal user session cookies or credentials, enabling account takeover and unauthorized content manipulation.
If Mitigated
With proper input validation and output encoding, the risk is reduced to minimal, though the vulnerability still exists in the codebase.
🎯 Exploit Status
Exploitation requires access to modify category titles, which typically requires some level of authentication, though the exact requirements depend on NotesCMS configuration.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Commit 95322c5121dbd7070f3bd54f2848079654a0a8ea (2025-03-31) or later
Vendor Advisory: https://github.com/PrivateAccount/NotesCMS/issues/1
Restart Required: No
Instructions:
1. Update NotesCMS to commit 95322c5121dbd7070f3bd54f2848079654a0a8ea or later. 2. If using git: git pull origin main. 3. Verify the fix by checking the commit hash.
🔧 Temporary Workarounds
Input Validation Filter
allImplement server-side input validation to sanitize HTML tags in category title fields before storage.
🧯 If You Can't Patch
- Implement a Web Application Firewall (WAF) with XSS protection rules to block malicious payloads.
- Disable or restrict access to the /index.php?route=categories endpoint for untrusted users.
🔍 How to Verify
Check if Vulnerable:
Check if your NotesCMS version is earlier than commit 95322c5121dbd7070f3bd54f2848079654a0a8ea by examining the git commit history or version metadata.Check Version:
git log --oneline -1Verify Fix Applied:
After updating, test by attempting to inject a simple XSS payload like <script>alert('test')</script> into a category title and verify it's properly sanitized when displayed.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /index.php?route=categories with HTML/script tags in parameters
- Multiple failed login attempts followed by category modifications
Network Indicators:
- HTTP requests containing script tags or JavaScript code in category title parameters
SIEM Query:
source="web_logs" AND (url="/index.php?route=categories" AND (param="title" CONTAINS "<script>" OR param="title" CONTAINS "javascript:"))