Shanghai Lingdang Information Technology Lingdang CRM index.php sql injection

A vulnerability was found in Shanghai Lingdang Information Technology Lingdang CRM up to 8.6.0.0 and classified as critical. This issue affects some unknown processing of the file /crm/weixinmp/index.php?userid=123&module=Users&usid=1&action=UsersAjax&minipro_const_type=1. The manipulation of the argument searchcontent leads to sql injection. The attack may be initiated 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.