Date: 
Wednesday, Feb 26th, 2025
Advisory ID: 
BACKDROP-SA-CONTRIB-2025-006
Security risk: 
Critical
Vulnerability: 
Access bypass
Versions affected: 
  • Masquerade module versions prior to 1.x-1.0.1.
Description: 

The Masquerade module allows users to temporarily switch to another user account.

The module provides a "Masquerade as admin" permission to restrict users from switching to an account with administrative privileges. This permission is not always honored and may allow non-administrative users to masquerade as an administrator.

This vulnerability is mitigated by the fact that an attacker must have a role with the "Masquerade as user" permission.

Solution: 

Upgrade your site to the most recent version of Masquerade. Download available on the Masquerade 1.0.1. release page

Fixed By: 
Coordinated By: 

Security email list

Backdrop maintains a security mailing list. Whenever a security release comes out, an email will be sent to everyone subscribed to that list, announcing the new release. Please follow the steps below to join the Security email list.

  1. Log in to backdropcms.org
  2. Edit your profile
  3. Switch to the "Subscriptions" tab
  4. Check the box labeled "Security updates"
  5. Save the form