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TITLE:
Simple Machines Forum "packages.xml" Cross-Site Scripting

SECUNIA ADVISORY ID:
SA33670

VERIFY ADVISORY:
http://secunia.com/advisories/33670/

CRITICAL:
Less critical

IMPACT:
Cross Site Scripting

WHERE:
>From remote

SOFTWARE:
Simple Machines Forum 1.x
http://secunia.com/advisories/product/5285/

DESCRIPTION:
Xianur0 has discovered a vulnerability in Simple Machines Forum,
which can be exploited by malicious people to conduct cross-site
scripting attacks.

Input read from the "text" and "description" elements in a
"packages.xml" file (e.g. when "action" is set to "packageget", "sa"
is set to "browse", and "absolute" is set to the web address serving
the malicious "packages.xml" file) is not properly sanitised before
being returned to the user. This can be exploited to execute
arbitrary HTML and script code in an administrative user's browser
session in the context of an affected site.

This vulnerability is confirmed in version 1.1.7. Other versions may
also be affected.

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

PROVIDED AND/OR DISCOVERED BY:
Xianur0

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