Invision Power Board 3.0.5 stored Cross site Scripting

                                                Product: Invision Power Board
Security-Risk: moderated
Remote-Exploit: yes
Vendor-URL: http://www.invisionpower.com
Vendor-Status: informed
Advisory-Status: published

Credits
============
Discovered by: David Vieira-Kurz
http://www.majorsecurity.info/penetrationstest.php


Affected Products:
----------------------------
Invision Power Board 3.0.5 and prior

Introduction
============
Invision Power Board is a widely used forums script.

More Details
============
Input passed to the calendar app (which is one of the core modules inside invision power board) is not properly 
sanitised before being stored and 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 calendar can be shown on every page of the invision board, so that in fact this is a serious security issue.

Solution
=============
Web applications should never trust on user generated input and therefore sanatize all input.

MajorSecurity
================
MajorSecurity is a German penetrationtesting and security research company which focuses
on web application security. We offer professional penetrationstest, security audits,
source code reviews.