All In One SEO Pack <= 4.2.3.1 is vulnerable to Multiple Cross-Site Request Forgery (CSRF) vulnerabilities

The All in One SEO plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 4.2.3.1. This is due to missing or incorrect nonce validation on several of its functions. This makes it possible for unauthenticated attackers to execute them, via forged request granted they can trick a site administrator into performing an action such as clicking on a link.