The Event Tickets with Ticket Scanner WordPress plugin before 2.3.8 does not sanitise and escape some parameters, which could allow users with a role as low as admin to perform Cross-Site Scripting attacks
The Event Tickets with Ticket Scanner WordPress plugin before 2.5.4 does not have CSRF check in place when updating its settings, which could allow attackers to make a logged in admin change them via a CSRF attack
Deserialization of Untrusted Data vulnerability in Vollstart Event Tickets with Ticket Scanner event-tickets-with-ticket-scanner allows Server Side Include (SSI) Injection.This issue affects Event Tickets with Ticket Scanner: from n/a through <= 2.3.11.