In version v0.3.8 of open-webui/open-webui, there is an improper access control vulnerability. On the frontend admin page, administrators are intended to view only the chats of non-admin members. However, by modifying the user_id parameter, it is possible to view the chats of any administrator, including those of other admin (owner) accounts.
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: