Adobe ColdFusion 9.0, 9.0.1, and 9.0.2, when a password is not configured, allows remote attackers to bypass authentication and possibly execute arbitrary code via unspecified vectors, as exploited in the wild in January 2013.
http://www.adobe.com/support/security/bulletins/apsb13-03.html
http://www.adobe.com/support/security/advisories/apsa13-01.html