Schema & Structured Data for WP & AMP < 1.70 - Unauthenticated Non-Public Comment Disclosure via Review Filter

The Schema & Structured Data for WP & AMP WordPress plugin before 1.70 does not verify that a post is publicly viewable before returning its approved comments through the review feature, allowing unauthenticated attackers to read approved comments on private, draft and password-protected posts, and to retrieve approved comments site-wide.