SA-CONTRIB-2012-096 - Authoring HTML - Cross Site Scripting (XSS)

This module creates an input format suitable for use within a WYSIWYG editor. It adds support for the iframe HTML tag, making it friendly with the popular iframe embeds available in popular video sites like YouTube and Vimeo. It supports the script tag too. Both tags will only be allowed if the referred URL is whitelisted. By default, you can refer some well known video sites in the iframe tag and any site with the <script> tag.

The module doesn’t sufficiently verify the whitelisted hosts. This allows an attacker to register and use a malicious host, bypassing verification.

This vulnerability is mitigated by the fact that an attacker must have a role authorized to use the “Authoring HTML” input format.

CVE: CVE-2012-2725

Versions affected

• Authoring HTML 6.x-1.x versions prior to 6.x-1.1.

Drupal core is not affected. If you do not use the contributed Authoring HTML module, there is nothing you need to do.

Solution

Install the latest version:

• If you use the Authoring HTML module for Drupal 6.x, upgrade to Authoring HTML 6.x-1.1

Also see the Authoring HTML project page.

Reported by

• Eriksen Costa the module maintainer

Fixed by

• Eriksen Costa the module maintainer
• Matt Chapman of the Drupal Security Team

Coordinated by

• Matt Chapman of the Drupal Security Team
• Greg Knaddison of the Drupal Security Team