The LearnPress WordPress plugin before 4.4.4 does not validate a user-supplied URL before the server fetches it, allowing users with the instructor role to induce the server to issue requests to arbitrary external hosts, a blind and bounded server-side request forgery.
Weakness
The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.