By Drupal Security Team on
  • Advisory ID: DRUPAL-SA-CONTRIB-2012-158
  • Project: MailChimp (third-party module)
  • Version: 7.x
  • Date: 2012-October-24
  • Security risk: Moderately critical
  • Exploitable from: Remote
  • Vulnerability: Cross Site Scripting

Description

This module provides integration with the MailChimp email delivery service.

There are two issues with the webhook processing, which is exposed as an API in mailchimp.module and used by mailchimp_lists.module to update subscriber information.

  • The webhook URL key can be trivially calculated.
  • Webhook variables from POST requests are not properly sanitized.

Mitigating these issues is the fact that attackers cannot tamper with email subscriptions even if they know the webhook path, because changes are pulled in from the MailChimp API only.

CVE: CVE-2012-5551

Versions affected

  • MailChimp 7.x-2.x versions prior to 7.x-2.7.

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

Solution

Install the latest version:

Also see the MailChimp project page.

Reported by

Fixed by

Coordinated by

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.

Learn more about the Drupal Security team and their policies, writing secure code for Drupal, and securing your site.

⋅ Categories: Drupal 7.x