ELEX WordPress HelpDesk & Customer Ticketing System <= 3.3.1 - Missing Authorization to Authenticated (Subscriber+) Trash Empty

The ELEX WordPress HelpDesk & Customer Ticketing System plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the 'eh_crm_settings_empty_trash' function in all versions up to, and including, 3.3.1. This makes it possible for authenticated attackers, with Subscriber-level access and above, to empty the ticket trash.