Newsletters < 4.9.8 - Cross-Site Request Forgery

Description

The Newsletters plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 4.9.7. This is due to missing or incorrect nonce validation on the admin_subscribers() function. This makes it possible for unauthenticated attackers to delete an unsubscribe subscribers via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.