* Advisory ID: DRUPAL-SA-CONTRIB-2012-032 * Project: Block Class [1] (third-party module) * Version: 7.x * Date: 2012-March-07 * Security risk: Moderately Critical [2] * Exploitable from: Remote * Vulnerability: Cross Site Scripting

-------- DESCRIPTION ---------------------------------------------------------

The block class module allows users to add classes to any block through the block's configuration interface

The class names in a block were not properly filtered. Someone with the ability to modify or create blocks could inject java script that would be rendered when viewing the block.

-------- VERSIONS AFFECTED ---------------------------------------------------

* Blockclass versions prior to 7.x-1.0.

Drupal core is not affected. If you do not use the contributed Block Class [3] module, there is nothing you need to do.

-------- SOLUTION ------------------------------------------------------------

Install the latest version:

* If you use the block class module for Drupal 7.x, upgrade to block class 7.x-1.1 [4]

See also the Block Class [5] project page.

-------- REPORTED BY ---------------------------------------------------------

* Katherine Senzee [6]

-------- FIXED BY ------------------------------------------------------------

* Berend de Boer [7] the module maintainer

-------- COORDINATED BY ------------------------------------------------------

* Michael Hess [8] of the Drupal Security Team

-------- CONTACT AND MORE INFORMATION ----------------------------------------

The Drupal security team can be reached at security at drupal.org or via the contact form at http://drupal.org/contact [9].

Learn more about the Drupal Security team and their policies [10], writing secure code for Drupal [11], and securing your site [12].

[1] http://drupal.org/project/block_class [2] http://drupal.org/security-team/risk-levels [3] http://drupal.org/project/block_class [4] http://drupal.org/node/1471090 [5] http://drupal.org/project/block_class [6] http://drupal.org/user/139855 [7] http://drupal.org/user/143552 [8] http://drupal.org/user/102818 [9] http://drupal.org/contact [10] http://drupal.org/security-team [11] http://drupal.org/writing-secure-code [12] http://drupal.org/security/secure-configuration