FV Player < 7.5.56.7212 - Contributor+ SSRF via Media Library Import

The FV Flowplayer Video Player WordPress plugin before 7.5.56.7212 does not validate a user-supplied URL before performing a server-side fetch whose response body is stored and served publicly, allowing users with Contributor-level access and above to perform Server-Side Request Forgery (SSRF) attacks and to read the response of an internal resource when it is returned with an image content type.