The Frontis Blocks plugin for WordPress is vulnerable to Server-Side Request Forgery in all versions up to, and including, 1.1.6. This is due to insufficient restriction on the url parameter in the template_proxy function. This makes it possible for unauthenticated attackers to make web requests to arbitrary locations originating from the web application via the /template-proxy/ and /proxy-image/ endpoint.
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.
Related Attack Patterns
References
- https://plugins.trac.wordpress.org/browser/frontis-blocks/tags/1.1.4/includes/Admin/Admin.php#L910
- https://plugins.trac.wordpress.org/browser/frontis-blocks/trunk/includes/Admin/Admin.php#L910
- https://plugins.trac.wordpress.org/changeset/3444616/
- https://www.wordfence.com/threat-intel/vulnerabilities/id/322e0a27-9119-4b46-a043-d3a68c4fcdc4?source=cve