- Cross Site Scripting
- Third Party Libraries
- Backdrop Core 1.21.x versions prior to 1.21.4
- Backdrop Core 1.20.x versions prior to 1.20.7
Backdrop versions 1.19 and prior do not receive security coverage.
The Backdrop project uses the CKEditor library for rich-text editing. CKEditor has released a security update that impacts Backdrop.
If a Backdrop site is configured to use CKEditor for rich-text editing, an attacker that can create or edit content (even without access to CKEditor themselves) may be able to exploit one or more Cross-Site Scripting (XSS) vulnerabilities. Victims may be people who later edit that content using CKEditor, including site admins with privileged access.
For more information, see CKEditor's security advisories:
- CVE-2022-24728: HTML processing vulnerability allowing to execute JavaScript code
- CVE-2022-24729: Regular expression Denial of Service in dialog plugin
Upgrade your site to the most recent version of Backdrop core. Download available on the Backdrop CMS 1.21.4 release page. See the update instructions, if needed.
- Jess of the Drupal Security Team
- Wim Leers
- Lee Rowlands of the Drupal Security Team
- Nate Lampton of the Backdrop Security Team