Category SEO Meta Tags <= 2.5 - Cross-Site Request Forgery via csmt_admin_options

Description

The Category SEO Meta Tags plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 2.5. This is due to missing or incorrect nonce validation on the 'csmt_admin_options' function. This makes it possible for unauthenticated attackers to change the plugin settings via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.