Inactive User Deleter <= 1.59 - Cross-Site Request Forgery via Multiple Functions

The Inactive User Deleter plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 1.59. This is due to missing or incorrect nonce validation on multiple functions. This makes it possible for unauthenticated attackers to modify plugin settings, delete, activate, inactivate, and export users, and create multiple arbitrary users with default privileges via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.