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TITLE:
QuizShock "forward_to" Cross-Site Scripting

SECUNIA ADVISORY ID:
SA24831

VERIFY ADVISORY:
http://secunia.com/advisories/24831/

CRITICAL:
Less critical

IMPACT:
Cross Site Scripting

WHERE:
>From remote

SOFTWARE:
QuizShock 1.x
http://secunia.com/product/13874/

DESCRIPTION:
John Martinelli has reported a vulnerability in QuizShock, which can
be exploited by malicious people to conduct cross-site scripting
attacks.

Input passed to the "forward_to" parameter in auth.php is not
properly sanitised before being returned to a 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 reported in version 1.6.1. Other versions may
also be affected.

SOLUTION:
Edit the source code to ensure that input is properly sanitised.

PROVIDED AND/OR DISCOVERED BY:
John Martinelli

ORIGINAL ADVISORY:
http://john-martinelli.com/work/quizshock.txt

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