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CVSS Score
-| Package Name | Ecosystem | Vulnerable Versions | First Patched Version |
|---|---|---|---|
| wagtail | pip | < 4.1.9 | 4.1.9 |
| wagtail | pip | >= 4.2.0, < 5.0.5 | 5.0.5 |
| wagtail | pip | >= 5.1.0, < 5.1.3 | 5.1.3 |
The vulnerability stems from insufficient permission checks in the UserBulkAction view. The patch added PermissionCheckedMixin and permission policy enforcement, indicating the original implementation didn't properly validate user permissions. This allowed authenticated low-privilege users to access the view, triggering error messages that leaked sensitive information through disclosure of user display names in error responses.