Wagtail: Improper permission handling when comparing revisions

Wagtail is an open source content management system built on Django. Prior to 7.0.7, 7.3.2, and 7.4, 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. This vulnerability is fixed in 7.0.7, 7.3.2, and 7.4.