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TITLE:
BlogEngine.NET Cumulus Widget "tagcloud" Cross-Site Scripting
Vulnerability

SECUNIA ADVISORY ID:
SA39779

VERIFY ADVISORY:
http://secunia.com/advisories/39779/

DESCRIPTION:
MustLive has reported a vulnerability in the Cumulus widget for
BlogEngine.NET, which can be exploited by malicious people to conduct
cross-site scripting attacks.

Input passed via the "tagcloud" parameter to
widgets/cumulus/tagcloud.swf (when "mode" is set to "tags") 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:
Filter malicious characters and character sequences using a proxy.

PROVIDED AND/OR DISCOVERED BY:
MustLive

ORIGINAL ADVISORY:
http://websecurity.com.ua/4184/

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