CVE-2010-3685: Improper Authentication

The OpenID module in Drupal 6.x before 6.18, and the OpenID module 5.x before 5.x-1.4 for Drupal, violates the OpenID 2.0 protocol by not checking for reuse of openid.responsenonce values, which allows remote attackers to bypass authentication by leveraging an assertion from an OpenID provider...