See how memberhero compares to other vendors in security performance
The MemberHero WordPress plugin through 6.9 does not perform any capability or nonce check on one of its AJAX actions, allowing any authenticated user, such as a subscriber, to make the site send arbitrary HTML emails to arbitrary recipients from its own mail system, which can be abused to relay phishing carrying the site's identity and domain reputation.
The Member Hero WordPress plugin through 1.0.9 lacks authorization checks, and does not validate the a request parameter in an AJAX action, allowing unauthenticated users to call arbitrary PHP functions with no arguments.