Drupal 4.6.x before 4.6.10 and 4.7.x before 4.7.4 allows form submissions to be redirected, which allows remote attackers to obtain arbitrary form information via a crafted URL.
https://exchange.xforce.ibmcloud.com/vulnerabilities/29682
http://www.vupen.com/english/advisories/2006/4120
http://www.securityfocus.com/bid/20631
http://www.securityfocus.com/archive/1/449200/100/0/threaded
http://www.openpkg.org/security/advisories/OpenPKG-SA-2006.025-drupal.html
http://securityreason.com/securityalert/1764