Ruby on Rails 2.1.x 2.2.x and 2.3.x before 2.3.11 and 3.x before 3.0.4 does not properly validate HTTP requests that contain an X-Requested-With header which makes it easier for remote attackers to conduct cross-site request forgery (CSRF) attacks via forged (1) AJAX or (2) API requests that leverage \combinations of browser plugins and HTTP redirects \ a related issue to CVE-2011-0696.