In open-webui/open-webui version v0.3.8, there is an improper privilege management vulnerability. The application allows an attacker, acting as an admin, to delete other administrators via the API endpoint http://0.0.0.0:8080/api/v1/users/{uuid_administrator}. This action is restricted by the user interface but can be performed through direct API calls.
The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor.