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How the CVE Works:
The CVE-2025-XXXX vulnerability in Mezzanine CMS v6.1.0 arises due to insufficient input sanitization in the `/blog/blogpost/add` endpoint. Attackers can inject malicious JavaScript or HTML payloads into blog posts, which are then rendered unsanitized in the browser of other users. This stored XSS attack allows execution of arbitrary scripts in the context of the victim’s session, potentially leading to session hijacking, defacement, or data theft. The vulnerability stems from improper validation of user-supplied content before persistence and rendering.
DailyCVE Form:
Platform: Mezzanine CMS
Version: 6.1.0
Vulnerability: Stored XSS
Severity: Moderate
Date: Jul 23, 2025
Prediction: Patch by Aug 15, 2025
What Undercode Say:
Check installed version
pip show mezzanine
PoC payload (sanitized):
<script>alert('XSS')</script>
Mitigation (temporary):
DISABLE_BLOG_POST_HTML = True In settings.py
How Exploit:
1. Authenticate as low-privilege user.
2. Submit malicious script via blog post form.
3. Trigger payload when admin views post.
Protection from this CVE:
- Upgrade to patched version (TBD).
- Apply CSP headers.
- Sanitize `POST` inputs server-side.
Impact:
- Session hijacking.
- Unauthorized actions.
- Data leakage.
Sources:
Reported By: github.com
Extra Source Hub:
Undercode
