A vulnerability classified as critical was found in Sichuan Yougou Technology KuERP up to 1.0.4. Affected by this vulnerability is the function checklogin of the file /application/index/common.php. The manipulation of the argument App_User_id/App_user_Token leads to improper authentication. The exploit has been disclosed to the public and may be used. The identifier VDB-252253 was assigned to this vulnerability. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.