* Advisory ID: DRUPAL-SA-CONTRIB-2009-010 * Project: Plus 1 (third-party module) * Version: 6.x * Date: 2009 March 18 * Security risk: Not critical * Exploitable from: Remote * Vulnerability: Cross-site request forgery (CSRF)

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

The Plus 1 module provides a voting widget for content that records votes using Ajax.

The URL for voting is vulnerable to cross-site request forgeries (CSRF [1]) making it possible for users to unknowingly vote for content.

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

* Versions of Plus 1 prior to 6.x-2.6

Drupal core is not affected. If you do not use the contributed Plus 1 module, there is nothing you need to do.

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

Install the latest version:

* If you use Plus 1 for Drupal 6.x upgrade to Plus 1 6.x-2.6 [2]

See also the Plus 1 project page [3].

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

Greg Knaddison of the Drupal security team.

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

Greg Knaddison, Ben Jeavons, Neil Drumm, and Caroline Schnapp.

-------- CONTACT -------------------------------------------------------------

The security contact for Drupal can be reached at security at drupal.org or via the form at http://drupal.org/contact [4].

[1] http://en.wikipedia.org/wiki/Csrf [2] http://drupal.org/node/405672 [3] http://drupal.org/project/plus1 [4] http://drupal.org/contact