Frappe ERPNext before 15.105.0 and 16.x before 16.15.0 contains a missing authorization...

Frappe ERPNext before 15.105.0 and 16.x before 16.15.0 contains a missing authorization vulnerability in certain document creation endpoints that fail to verify that the requesting portal user belongs to the target party. Authenticated portal users can send requests to these endpoints to create documents on behalf of parties other than their own.