SilverStripe 2.3.x before 2.3.6 allows remote attackers to obtain sensitive information via the (1) debug_memory parameter to core/control/Director.php or (2) debug_profile parameter to main.php.
https://exchange.xforce.ibmcloud.com/vulnerabilities/56546
http://www.securityfocus.com/bid/38394
http://www.openwall.com/lists/oss-security/2012/05/01/3
http://secunia.com/advisories/38697
http://doc.silverstripe.org/sapphire/en/trunk/changelogs//2.3.6