Block Class - Critical - Cross Site Scripting (XSS) - SA-CONTRIB-2015-175

This module enables you to add custom classes to blocks.
The module doesn’t sufficiently scrub class names written by a malicious block class administrator.
This vulnerability is mitigated by the fact that an attacker must have a role with the permission “Administer block classes”.

CVE identifier(s) issued

• CVE-2016-3144

Versions affected

• block_class 7.x-2.x versions prior to 7.x-2.2.

Drupal core is not affected. If you do not use the contributed Block Class 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-2.2

Also see the Block Class project page.

Reported by

• Neil Drumm of the Drupal Security Team

Fixed by

• Berend de Boer the module maintainer

Coordinated by

• Ben Dougherty of the Drupal Security Team
• Owen Barton of the Drupal Security Team