The SiteAlert (Formerly WP Health) plugin for WordPress is vulnerable to unauthorized access of data due to a missing capability check on multiple functions in all versions up to, and including, 1.9.8. This makes it possible for unauthenticated attackers to view the site health information, including a list of installed and outdated plugins, PHP and Database version, etc.
https://plugins.trac.wordpress.org/browser/my-wp-health-check/tags/1.9.8/php/ajax.php#L159
https://plugins.trac.wordpress.org/browser/my-wp-health-check/tags/1.9.8/php/ajax.php#L144
https://plugins.trac.wordpress.org/browser/my-wp-health-check/tags/1.9.8/php/ajax.php#L129