Shiprocket Module REST API Module restapi sql injection

A vulnerability was found in Shiprocket Module 3/4 on OpenCart. It has been declared as critical. Affected by this vulnerability is an unknown functionality of the file /index.php?route=extension/shiprocket/module/restapi of the component REST API Module. The manipulation of the argument x-username leads to sql injection. The attack can be launched remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.