BradWenqiang HR Background Management register selectAll sql injection

A vulnerability was found in BradWenqiang HR 2.0. It has been rated as critical. Affected by this issue is the function selectAll of the file /bishe/register of the component Background Management. The manipulation of the argument userName leads to sql injection. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. VDB-256886 is the identifier assigned to this vulnerability. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.