GHSA-jq2f-59pj-p3m3
Medium · 4.3Craft CMS has a Missing Authorization Check on User Group Removal via save-permissions Action
CVSS
4.3
EPSS
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Published
Apr 14, 2026
CISA due date
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The record
The `actionSavePermissions()` endpoint allows a user with only `viewUsers` permission to remove arbitrary users from all user groups. While `_saveUserGroups()` enforces per-group authorization for additions, it performs no equivalent authorization check for removals, so submitting an empty `groups` value removes all existing group memberships.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
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