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.
The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.
Access control involves the use of several protection mechanisms such as:
When any mechanism is not applied or otherwise fails, attackers can compromise the security of the product by gaining privileges, reading sensitive information, executing commands, evading detection, etc. There are two distinct behaviors that can introduce access control weaknesses: