Wagtail has improper permission handling when comparing revisions

Impact

A CMS user without the ability to edit a page could access revisions of the page through the revision compare view if they knew the primary key of two revisions. This could potentially result in disclosure of sensitive information.

Patches

Patched versions have been released as Wagtail 7.0.7 and 7.3.2. The new 7.4 LTS feature release also incorporates this fix.

Workarounds

No workaround is available.

Acknowledgements

Many thanks to Seoyoung Kang @seoyoung-kang from AhnLab and an independent security researcher for reporting this issue.

For more information

If there are any questions or comments about this advisory:

• Visit Wagtail's support channels
• Send an email to security@wagtail.org (view the security policy for more information).