Popover Windows <= 1.2 - Cross-Site Request Forgery to Arbitrary Popover Configuration Update

The Popover Windows plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 1.2. This is due to missing or incorrect nonce validation. This makes it possible for unauthenticated attackers to update the plugin's settings via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.