Launchpad.net

CVE 2015-9284

The request phase of the OmniAuth Ruby gem is vulnerable to Cross-Site Request Forgery when used as part of the Ruby on Rails framework, allowing accounts to be connected without user intent, user interaction, or feedback to the user. This permits a secondary account to be able to sign into the web application as the primary account.

See the CVE page on Mitre.org for more details.