CVE-2010-3091: Drupal

Medium severity, CVSS 5.0. EPSS: 2.4% chance of exploitation in the next 30 days.

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 verifying the openid.return_to value, which allows remote attackers to bypass authentication by leveraging an assertion from an OpenID provider.

Affected products

• Drupal Drupal: version 6.0 only; version 6.1 only; version 6.2 only; version 6.3 only; version 6.4 only; version 6.5 only; …
• Peter Wolanin Openid: version 5.x-1.0 only; version 5.x-1.1 only; version 5.x-1.2 only; version 5.x-1.3 only; version 5.x-1.x only

Published 2010-09-29. Last modified 2026-06-16.