Vanilla v.1.1.7 Cross-Site Scripting

Author: Gerendi Sandor Attila
Original advisory: http://gsasec.blogspot.com/2009/05/vanilla-v117-cross-site-scripting.html
Date: May 14, 2009
Package: Vanilla (1.1.7)
Product Homepage: http://getvanilla.com/
Versions Affected: v.1.1.7, 1.1.5 (Other versions may also be affected)
Severity: Medium

Input passed to the 'RequestName' header parameter when posting to '/ajax/updatecheck.php' is
not sanitized before it is 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.

Example:

http://somehost/ajax/updatecheck.php?PostBackKey=1&ExtensionKey=1&RequestName=1<script>alert(123)</script>

will return:

1<script>alert(123)</script>|[ERROR]There was a problem authenticating your post information.

Status:

1. Contacted the author at: May 15, 2009 via http://lussumo.com/
2. The author corrected the problem in the same day (read here).
   Publicat de Attila la 11:50 PM 0 comentarii