CVE-2021-31590

PwnDoc through 2021-04-22 has incorrect JSON Webtoken handling, leading to incorrect access control. With a valid JSON Webtoken that is used for authentication and authorization, a user can keep his admin privileges even if he is downgraded to the "user" privilege. Even after a user’s account is deleted, the user can still access the administration panel (and add or delete users) and has complete access to the system.

Source: CVE-2021-31590