The WooCommerce Customers Manager plugin for WordPress is vulnerable to Privilege Escalation due to a missing capability check on the ajax_assign_new_roles() function in all versions up to, and including, 31.3. This makes it possible for authenticated attackers, with Subscriber-level access and above, to elevate their privileges to that of an administrator.
The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor.
The product does not perform an authorization check when an actor attempts to access a resource or perform an action.