Pexels: Free Stock Photos <= 1.2.2 - Authenticated (Contributor+) Stored Cross-Site Scripting

Description

The Pexels: Free Stock Photos plugin for WordPress is vulnerable to Server-Side Request Forgery in all versions up to, and including, 1.2.2 via the pexels_fsp_images_options_validate() function. This makes it possible for authenticated attackers, with contributor-level access and above, to make web requests to arbitrary locations originating from the web application and can be used to query and modify information from internal services.