Manage User Columns < 1.0.6 - Cross-Site Request Forgery

Description

The Manage User Columns plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 1.0.5. This is due to missing or incorrect nonce validation on the dpk_muc_users_page_loaded() function. This makes it possible for unauthenticated attackers to update plugin settings via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.