WordPress before 2.2.2 allows remote attackers to redirect visitors to other websites and potentially obtain sensitive information via (1) the _wp_http_referer parameter to wp-pass.php, related to the wp_get_referer function in wp-includes/functions.php; and possibly other vectors related to (2) wp-includes/pluggable.php and (3) the wp_nonce_ays function in wp-includes/functions.php.
https://exchange.xforce.ibmcloud.com/vulnerabilities/35272
http://www.securityfocus.com/archive/1/472885/100/0/threaded
http://www.debian.org/security/2008/dsa-1564
http://securityreason.com/securityalert/2869