WP BrowserUpdate <= 4.4.1 is vulnerable to Cross Site Request Forgery (CSRF) vulnerability

The WP BrowserUpdate plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 4.4.1. This is due to missing or incorrect nonce validation on the wpbu_administration function. This makes it possible for unauthenticated attackers to modify the plugin settings via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.