Change Table Prefix <= 2.0 - Cross-Site Request Forgery via change_prefix_form

The Change Table Prefix plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 2.0. This is due to missing or incorrect nonce validation on the 'change_prefix_form' function. This makes it possible for unauthenticated attackers to toggle maintenance mode via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.