Date: 
Wednesday, Mar 2nd, 2022
Advisory ID: 
BACKDROP-SA-CORE-2022-002
Security risk: 
Moderately Critical
Vulnerability: 
Cross Site Scripting
Versions affected: 
  • Backdrop Core 1.21.x versions prior to 1.21.3
  • Backdrop Core 1.20.x versions prior to 1.20.6

Backdrop versions 1.19 and prior do not receive security coverage.

Description: 

Backdrop CMS doesn't sufficiently sanitize certain interface text when adding links to existing content.

This vulnerability is mitigated by the fact that an attacker must have a role with permission to create content (nodes), files, user accounts, taxonomy terms, views, or layouts.

Solution: 

Upgrade your site to the most recent version of Backdrop core. Download available on the Backdrop CMS 1.21.3 release page. See the update instructions, if needed.

Reported By: 
  • This issue was not reported to the Backdrop Security team before the CVE was created.
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.

  • Log in to backdropcms.org
  • Edit your profile
  • Scroll down to the "Email notifications" section
  • Check the box labeled "Receive BackdropCMS.org security announcements for core and contrib projects"