Open redirect vulnerability in wp-admin/upgrade.php in WordPress, probably 2.6.x, allows remote attackers to redirect users to arbitrary web sites and conduct phishing attacks via a URL in the backto parameter.Referenceshttp://www.debian.org/security/2009/dsa-1871http://archives.neohapsis.com/archives/bugtraq/2008-12/0226.htmlhttp://osvdb.org/52213https://exchange.xforce.ibmcloud.com/vulnerabilities/50382
