SilverStripe before 2.4.2 does not properly restrict access to pages in draft mode, which allows remote attackers to obtain sensitive information.
http://www.openwall.com/lists/oss-security/2012/05/01/3
http://www.openwall.com/lists/oss-security/2012/04/30/3
http://www.openwall.com/lists/oss-security/2012/04/30/1
http://open.silverstripe.org/changeset/110757
http://doc.silverstripe.org/sapphire/en/trunk/changelogs//2.4.2