Date: 
Wednesday, Aug 7th, 2019
Advisory ID: 
BACKDROP-SA-CORE-2019-011
Security risk: 
Moderately Critical
Vulnerability: 
Cross Site Scripting
CVE ID: 
CVE-2019-14769
Versions affected: 
  • Backdrop Core 1.13.x versions prior to 1.13.3
  • Backdrop Core 1.12.x versions prior to 1.12.8
Description: 

Backdrop CMS doesn't sufficiently filter output when displaying certain block labels created by administrators. An attacker could potentially craft a specialized label, then have an administrator execute scripting when administering a layout.

This issue is mitigated by the attacker requiring permission to create custom blocks on the site, which is typically an administrative permission.

Solution: 

Upgrade your site to the most recent version of Backdrop core. Download available on the Backdrop CMS 1.13.3 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
  2. Edit your profile
  3. Switch to the "Subscriptions" tab
  4. Check the box labeled "Security updates"
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