CVE-2021-29434: Torchbox Wagtail

Medium severity, CVSS 4.8. EPSS: 0.6% chance of exploitation in the next 30 days.

Wagtail is a Django content management system. In affected versions of Wagtail, when saving the contents of a rich text field in the admin interface, Wagtail does not apply server-side checks to ensure that link URLs use a valid protocol. A malicious user with access to the admin interface could thus craft a POST request to publish content with `javascript:` URLs containing arbitrary code. The vulnerability is not exploitable by an ordinary site visitor without access to the Wagtail admin. See referenced GitHub advisory for additional details, including a workaround. Patched versions have been released as Wagtail 2.11.7 (for the LTS 2.11 branch) and Wagtail 2.12.4 (for the current 2.12 branch).

Affected products

• Torchbox Wagtail: before 2.11.6 (fixed in 2.11.6); from 2.11.0, before 2.11.7 (fixed in 2.11.7); from 2.12.0, before 2.12.4 (fixed in 2.12.4)

Published 2021-04-19. Last modified 2026-06-17.