The WC Vendors WordPress plugin before 2.7.2.1 does not have CSRF protection on some of its front-end order shipment status actions, which could allow attackers to make a logged-in vendor change the shipment status of their own orders via a crafted request.
https://wpscan.com/vulnerability/804efc9d-d2b4-46f0-a84f-0ff5fed7d3d6/