Poll Maker <= 5.5.4 - Cross-Site Request Forgery to Poll Duplication

The Poll Maker – Versus Polls, Anonymous Polls, Image Polls plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 5.5.4. This is due to missing or incorrect nonce validation on the duplicate_poll() function. This makes it possible for unauthenticated attackers to duplicate polls via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.