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
https://docs.wagtail.org/en/stable/support.html
* Send an email to [security@wagtail.org](mailto:security@wagtail.org) (view the security policy
https://github.com/wagtail/wagtail/security/policy for more information).