eladmin Users API Endpoint UserController.java checkLevel access control

A vulnerability has been found in eladmin up to 2.7. Impacted is the function checkLevel of the file /rest/UserController.java of the component Users API Endpoint. Such manipulation leads to improper access controls. The attack can be executed remotely. The exploit has been disclosed to the public and may be used. The project was informed of the problem early through an issue report but has not responded yet.