Eventin < 4.0.27 - Missing Authorization to Unauthenticated Privilege Escalation

Description

The Event Manager, Events Calendar, Tickets, Registrations – Eventin plugin for WordPress is vulnerable to unauthorized access due to a missing capability check on the import_items() function in all versions up to, and including, 4.0.26. This makes it possible for unauthenticated attackers to import users that can have the administrator role leading to privilege escalation.