Reaction Information Security has discovered a vulnerability in the MF Gig Calendar plugin for WordPress, which can be exploited by malicious people to conduct cross-site scripting attacks.

Input passed via URL (when "page_id" set to the Event Calendar page) is not properly sanitised before being returned to the user. This can be exploited to execute arbitrary HTML and script code in a user's browser session in context of an affected site.

The vulnerability is confirmed in version 0.9.4.1. Other versions may also be affected.

Solution
No official solution is currently available.

Provided and/or discovered by
Chris Cooper and Joseph Sheridan, Reaction Information Security.

Original Advisory
Reaction Information Security:
http://www.reactionpenetrationtesting.co.uk/mf-gig-calendar-xss.html

Deep Links
Links available to Secunia VIM customers