Shanghai Lingdang Information Technology Lingdang CRM index_event.php server-side request forgery

A vulnerability was detected in Shanghai Lingdang Information Technology Lingdang CRM up to 8.6.5.4. This affects an unknown function of the file crm/WeiXinApp/dingtalk/index_event.php. The manipulation of the argument corpurl results in server-side request forgery. The attack can be launched remotely. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.