Date: 
Wednesday, Dec 18th, 2019
Security risk: 
Moderately Critical
Advisory ID: 
BACKDROP-SA-CORE-2019-015
Vulnerability: 
Cross Site Scripting
Versions affected: 
  • Backdrop Core 1.14.x versions prior to 1.14.2
Description: 

Backdrop CMS doesn't sufficiently filter output when displaying file type descriptions created by administrators. An attacker could potentially craft a specialized description, then have an administrator execute scripting when viewing the list of file types.

This vulnerability is mitigated by the fact that an attacker must have a role with the permission "Administer file types".

Solution: 

Upgrade your site to the most recent version of Backdrop core. Download available on the Backdrop CMS 1.14.2 release page. See the update instructions, if needed.

Reported By: 
  • Bot Kotatu 
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"