The Code Embed plugin for WordPress is vulnerable to Server-Side Request Forgery in all versions up to, and including, 2.5 via the ce_get_file() 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.
https://plugins.trac.wordpress.org/changeset/3182609/
https://plugins.trac.wordpress.org/browser/simple-embed-code/trunk/includes/add-embeds.php#L145