system
Provide references for <CVE-2017-6921>.
user
Where can I find more information about <CVE-2017-6921>?
assistant
References are available at: http://www.securityfocus.com/bid/99222, https://www.drupal.org/forum/newsletters/security-advisories-for-drupal-core/2017-06-21/drupal-core-multiple, http://www.securitytracker.com/id/1038781.