GHSA-fc75-58r8-rm3h Wagtail vulnerable to disclosure of user names via admin bulk action views

• PyPI wagtail: < 4.1.9 → fixed in 4.1.9 • PyPI wagtail: >= 4.2.0, < 5.0.5 → fixed in 5.0.5 • PyPI wagtail: >= 5.1.0, < 5.1.3 → fixed in 5.1.3

Impact A user with a limited-permission editor account for the Wagtail admin can make a direct URL request to the admin view that handles bulk actions on user accounts. While authentication rules prevent the user from making any changes, the error message discloses the display names of user accounts, and by modifying URL parameters, the user can retrieve the display name for any user. The vulnerability is not exploitable by an ordinary site visitor without access to the Wagtail admin. Patches Patched versions have been released as Wagtail 4.1.9 (LTS), 5.0.5 and 5.1.3. The fix is also included in Release Candidate 1 of the forthcoming Wagtail 5.2 release. Workarounds None. Acknowledgements Many thanks to @quyenheu for reporting this issue. For more information If you have any questions or comments about this advisory: • Visit Wagtail's support channels • Email us at [email protected] (view our security policy for more information).