CVE-2025-52037
📋 TL;DR
This stored cross-site scripting (XSS) vulnerability in NotesCMS allows attackers to inject malicious scripts into service description titles via the /index.php?route=sites page. When other users view the compromised page, the scripts execute in their browsers, potentially stealing session cookies or performing unauthorized actions. All NotesCMS instances with the vulnerable code 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 compromising all user accounts and site content.
Likely Case
Attackers inject malicious JavaScript to steal session cookies from authenticated users, leading to account compromise and unauthorized content manipulation.
If Mitigated
With proper input validation and output encoding, malicious scripts would be neutralized, preventing execution while maintaining functionality.
🎯 Exploit Status
Exploitation requires access to modify service descriptions, which typically requires some level of authentication. The vulnerability is stored/persistent, making it more dangerous than reflected XSS.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Fixed in commit 95322c5121dbd7070f3bd54f2848079654a0a8ea (2025-03-31)
Vendor Advisory: https://github.com/PrivateAccount/NotesCMS/issues/3
Restart Required: No
Instructions:
1. Update NotesCMS to the latest version containing commit 95322c5121dbd7070f3bd54f2848079654a0a8ea or later. 2. If using git, pull the latest changes from the repository. 3. Verify the fix by checking that the vulnerable code has been replaced with proper input sanitization.
🔧 Temporary Workarounds
Input Validation Filter
allImplement server-side input validation to sanitize HTML tags in service description titles
Implement server-side filtering for HTML/JavaScript in title fields before storage
Output Encoding
allApply proper HTML entity encoding when displaying user-controlled content
Use htmlspecialchars() or equivalent when outputting title content in templates
🧯 If You Can't Patch
- Implement a web application firewall (WAF) with XSS protection rules
- Restrict access to the /index.php?route=sites page to trusted users only
🔍 How to Verify
Check if Vulnerable:
Check if your NotesCMS version includes commit 7d821a0f028b0778b245b99ab3d3bff1ac10e2d3 but not commit 95322c5121dbd7070f3bd54f2848079654a0a8eaCheck Version:
git log --oneline | head -20Verify Fix Applied:
Test if HTML/JavaScript injection in service description titles is properly sanitized and doesn't execute📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /index.php?route=sites with script tags in parameters
- Multiple failed login attempts followed by successful access to admin functions
Network Indicators:
- HTTP requests containing JavaScript payloads in title parameters
- Unexpected outbound connections from user browsers after visiting the sites page
SIEM Query:
source="web_logs" AND uri="/index.php" AND query="route=sites" AND (title CONTAINS "<script>" OR title CONTAINS "javascript:")