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TITLE:
MediaWiki "useskin" Cross-Site Scripting Vulnerability

SECUNIA ADVISORY ID:
SA32131

VERIFY ADVISORY:
http://secunia.com/advisories/32131/

CRITICAL:
Less critical

IMPACT:
Cross Site Scripting

WHERE:
>From remote

SOFTWARE:
MediaWiki 1.x
http://secunia.com/advisories/product/2546/

DESCRIPTION:
A vulnerability has been reported in MediaWiki, which can be
exploited by malicious people to conduct cross-site scripting
attacks.

Input passed to the "useskin" parameter is not properly sanitised
before being 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.

Successful exploitation requires that $wgUseSiteCss is enabled, which
is the default.

The vulnerability is reported in version 1.12.0 and all 1.13.x
versions prior to 1.13.2.

SOLUTION:
Update to version 1.12.1 or 1.13.2.

PROVIDED AND/OR DISCOVERED BY:
Reported by the vendor.

ORIGINAL ADVISORY:
http://lists.wikimedia.org/pipermail/mediawiki-announce/2008-October/000078.html
http://svn.wikimedia.org/svnroot/mediawiki/tags/REL1_12_1/phase3/RELEASE-NOTES
http://svn.wikimedia.org/svnroot/mediawiki/tags/REL1_13_2/phase3/RELEASE-NOTES

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