Shanghai Lingdang Information Technology Lingdang CRM index.php unrestricted upload

A vulnerability was found in Shanghai Lingdang Information Technology Lingdang CRM up to 8.6.0.0. It has been classified as critical. Affected is an unknown function of the file /crm/weixinmp/index.php?userid=123&module=Users&usid=1&action=UsersAjax&minipro_const_type=1&related_module=Singin. The manipulation of the argument name leads to unrestricted upload. It is possible to launch the attack 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.