Input validation vulnerability in FAT Event Lite 1.1

The FAT Event Lite plugin for WordPress has a security issue that affects versions 1.1 and below. This vulnerability allows attackers who are logged in with contributor-level access or higher to insert and run any files they want on the server. This means they can execute any PHP code in those files, which can lead to bypassing security measures, accessing confidential information, or even executing code if allowed file types, such as images, are uploaded and included.