The Auto Featured Image (Auto Post Thumbnail) plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the bulkactiongeneratehandler function in all versions up to, and including, 4.2.1. This makes it possible for authenticated attackers, with Contributor-level access and above, to delete or generate featured images on posts they do not own.
Missing Authorization vulnerability in Creative Motion Auto Featured Image (Auto Post Thumbnail) allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Auto Featured Image (Auto Post Thumbnail): from n/a through 4.1.2.