WP Filter & Combine RSS Feeds <= 0.4 - Missing Authorization to Authenticated (Contributor+) Feed Deletion

The WP Filter & Combine RSS Feeds plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the post_listing_page() function in all versions up to, and including, 0.4. This makes it possible for authenticated attackers, with Contributor-level access and above, to delete feeds.