Decoded: SMB Cybersecurity

Piranha CMS Cross-site Scripting (XSS) Vulnerability

Published Date: December 21, 2024

Package Affected Versions Patched Versions Severity
📦 Piranha (NuGet) <= 11.1.0 Moderate

Description

Vulnerability Details


A stored cross-site scripting (XSS) vulnerability exists in Piranha CMS version 11.1 and earlier. Attackers can inject and execute malicious JavaScript in a user’s browser.

How It Happens:



  1. An attacker creates a new page via /manager/pages.

  2. They add markdown content containing an XSS payload.

  3. When an admin or user views the content, the script executes in their browser.

Patches & Workarounds

Potential Fix or Mitigation:



  1. Sanitize User Input: Ensure all markdown content is properly sanitized before rendering.

  2. Content Security Policy (CSP): Implement a strict CSP to prevent the execution of injected scripts.

  3. Update Regularly: Monitor updates from the Piranha CMS team for an official patch.

  4. Restrict Permissions: Limit access to /manager/pages for untrusted users.

References

https://nvd.nist.gov/vuln/detail/CVE-2024-55341

https://github.com/PiranhaCMS/piranha.core

https://sec-fortress.github.io/posts/articles/posts/CVE-2024-55341.html
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