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Secunia integrated with Microsoft WSUS 
http://secunia.com/blog/71/



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TITLE:
Drupal Block Class Module Script Insertion Vulnerability

SECUNIA ADVISORY ID:
SA38244

VERIFY ADVISORY:
http://secunia.com/advisories/38244/

DESCRIPTION:
A vulnerability has been reported in the Block Class module for
Drupal, which can be exploited by malicious users to conduct script
insertion attacks.

Input passed via class field of a block's configuration interface is
not properly sanitised before being displayed to the user. This can
be exploited to insert arbitrary HTML and script code, which will be
executed in a user's browser session in context of an affected site
when the malicious data is being viewed.

The vulnerability is reported in versions prior to 6.x-1.3 and
5.x-1.2.

SOLUTION:
Block Class 6.x:
Update to version 6.x-1.3.
http://drupal.org/node/688624

Block Class 5.x:
Update to version 5.x-1.2.
http://drupal.org/node/688622

PROVIDED AND/OR DISCOVERED BY:
The vendor credits Didrik Nordström.

ORIGINAL ADVISORY:
SA-CONTRIB-2010-009:
http://drupal.org/node/690756

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