CVE-2026-41128 Craft CMS has a Missing Authorization Check on User Group Removal via save-permissions Action

Craft CMS is a content management system CMS. In versions 5.6.0 through 5.9.14, 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...

CVE-2026-41128

Craft CMS (versions 5.6.0–5.9.14) contains an authorization flaw in the actionSavePermissions() endpoint. A user with only viewUsers permission can remove arbitrary users from all groups because _saveUserGroups() lacks a corresponding removal authorization check for an empty groups payload. This ...

CVE-2026-41128 Craft CMS has a Missing Authorization Check on User Group Removal via save-permissions Action

Craft CMS is a content management system CMS. In versions 5.6.0 through 5.9.14, 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...

Craft CMS has a Missing Authorization Check on User Group Removal via save-permissions Action

Summary 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...

GHSA-JQ2F-59PJ-P3M3 Craft CMS has a Missing Authorization Check on User Group Removal via save-permissions Action

Summary 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...

Privilege Escalation

craftcms/cms is vulnerable to Privilege Escalation. The vulnerability is due to the actionSave function within ElementsController.php, because there are no checks for save permissions before and after applying POST params to the element, as well as the actionSaveUser function within...