The Truelysell Core plugin for WordPress is vulnerable to privilege escalation in versions less than, or equal to, 1.8.7. This is due to insufficient validation of the user_role parameter during user registration. This makes it possible for unauthenticated attackers to create accounts with elevated privileges, including administrator access.
The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor.