The PowerPress Podcasting plugin by Blubrry WordPress plugin before 11.17.1 does not validate one of its Podcast Episode URL settings before performing a server-side request with it, allowing users with a role as low as Contributor to perform Server-Side Request Forgery attacks that can target internal services.
https://wpscan.com/vulnerability/9363aaff-40d6-41c0-8edd-cbf671240ad2/