A vulnerability, which was classified as critical, has been found in 上海灵当信息科技有限公司 Lingdang CRM up to 8.6.4.3. Affected by this issue is some unknown functionality of the file /crm/wechatSession/index.php?msgid=1&operation=upload. The manipulation of the argument file leads to unrestricted upload. The attack may 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.