Big File Uploads <= 2.1.1 - Cross-Site Request Forgery via actions

The Big File Uploads plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 2.1.1. This is due to missing or incorrect nonce validation on the actions function. This makes it possible for unauthenticated attackers to dismiss or delay admin notifications via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.