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Secunia Survey

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TITLE:
Big Webmaster Guestbook Script Multiple Script Insertion
Vulnerabilities

SECUNIA ADVISORY ID:
SA19971

VERIFY ADVISORY:
http://secunia.com/advisories/19971/

CRITICAL:
Moderately critical

IMPACT:
Cross Site Scripting

WHERE:
>From remote

SOFTWARE:
Big Webmaster Guestbook Script 1.x
http://secunia.com/product/9758/

DESCRIPTION:
Javor Ninov has discovered some vulnerabilities in Big Webmaster
Guestbook Script, which can be exploited by malicious people to
conduct script insertion attacks.

Input passed to the "name", "email", "homepage", "city", "state", and
"country" parameters in addguest.cgi is not properly sanitised before
being used. This can be exploited to insert arbitrary HTML and script
code, which is executed in a user's browser session in context of an
affected site when malicious data is viewed.

The vulnerabilities have been confirmed in version 1.02. Other
versions may also be affected.

SOLUTION:
Filter malicious characters and character sequences in a web proxy.

PROVIDED AND/OR DISCOVERED BY:
Javor Ninov

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About:
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