Exposure of Sensitive Information to an Unauthorized Actor vulnerability in WPMU DEV Defender Security – Malware Scanner, Login Security & Firewall.This issue affects Defender Security – Malware Scanner, Login Security & Firewall: from n/a through 4.1.0.

The Defender Security WordPress plugin before 4.1.0 does not prevent redirects to the login page via the authredirect WordPress function, allowing an unauthenticated visitor to access the login page, even when the hide login page functionality of the plugin is enabled.

The Defender Security plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 2.4.6. This is due to missing or incorrect nonce validation on the verifyotplogintime() function. This makes it possible for unauthenticated attackers to verify a one time login via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.