Open redirect vulnerability in the drupal_goto function in Drupal 6.x before 6.38, when used with PHP before 5.4.7, allows remote attackers to redirect users to arbitrary web sites and conduct phishing attacks via a double-encoded URL in the "destination" parameter.

References

• https://nvd.nist.gov/vuln/detail/CVE-2016-3167
• https://www.drupal.org/SA-CORE-2016-001
• http://www.debian.org/security/2016/dsa-3498
• http://www.openwall.com/lists/oss-security/2016/02/24/19
• http://www.openwall.com/lists/oss-security/2016/03/15/10
• https://github.com/FriendsOfPHP/security-advisories/blob/master/drupal/core/CVE-2016-3167.yaml
• https://github.com/FriendsOfPHP/security-advisories/blob/master/drupal/drupal/CVE-2016-3167.yaml