Multiple cross-site request forgery (CSRF) vulnerabilities in PHPJabbers Event Booking Calendar 2.0 allow remote attackers to hijack the authentication of administrators for requests that (1) change the username and password of the administrator via an update action to the AdminOptions controller or conduct cross-site scripting (XSS) attacks via the (2) event_title parameter in a create action to the AdminEvents controller or (3) category_title parameter in a create action to the AdminCategories controller.