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TITLE:
vBulletin Two-Step External Links Module "url" Cross-Site Scripting
Vulnerability

SECUNIA ADVISORY ID:
SA39552

VERIFY ADVISORY:
http://secunia.com/advisories/39552/

DESCRIPTION:
A vulnerability has been reported in the Two-Step External Links
module for vBulletin, which can be exploited by malicious people to
conduct cross-site scripting attacks.

Input passed via the "url" parameter to externalredirect.php 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.

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

PROVIDED AND/OR DISCOVERED BY:
Edgard Chammas

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Please Note:
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Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
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