Cross-site scripting (XSS) vulnerability in the MF Gig Calendar plugin 0.9.2 for WordPress allows remote attackers to inject arbitrary web script or HTML via the query string to the calendar page.
https://euvd.enisa.europa.eu/vulnerability/EUVD-2012-4186
http://www.securityfocus.com/bid/55622
http://www.reactionpenetrationtesting.co.uk/mf-gig-calendar-xss.html