WP Delicious < 1.10.2 - Unauthenticated Arbitrary Post Meta Update via recipe_likes

The WP Delicious WordPress plugin before 1.10.2 does not perform an authorization check on one of its AJAX actions, allowing unauthenticated users to modify limited post metadata (a like counter and an associated identifier list) on arbitrary posts, including inflating the counter and growing the stored metadata without bound.