Date: 
Wednesday, Nov 20th, 2024
Advisory ID: 
BACKDROP-SA-CORE-2024-002
Security risk: 
Critical
Vulnerability: 
Cross Site Scripting
CVE ID: 
CVE-2024-54123
Versions affected: 
  • Backdrop Core 1.29.x versions prior to 1.29.2
  • Backdrop Core 1.28.x versions prior to 1.28.4

Backdrop versions 1.27 and prior do not receive security coverage.

Description: 

Backdrop CMS doesn't sufficiently sanitize SVG images when they are embedded into content.

This vulnerability is mitigated by the fact that the SVG tag must be in the list of allowed tags for a text format, and an attacker must have a role with sufficient permission to access the format, and upload images. 

Solution: 

Upgrade your site to the most recent version of Backdrop core. Download available on the Backdrop CMS 1.29.2 release page. See the update instructions, if needed.

Reported By: 
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
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  3. Switch to the "Subscriptions" tab
  4. Check the box labeled "Security updates"
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