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 equivalent authorization check for removals, so submitting an empty `groups` value removes all existing group memberships. Version 5.9.15 contains a patch.

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授权机制缺失

Craft CMS 安全漏洞

Craft CMS是Craft CMS开源的一套内容管理系统（CMS）。 Craft CMS 5.6.0版本至5.9.14版本存在安全漏洞，该漏洞源于actionSavePermissions端点允许仅具有viewUsers权限的用户从所有用户组中移除任意用户，可能导致权限提升。

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