Apache CXF before 2.5.9, 2.6.x before 2.6.6, and 2.7.x before 2.7.3, when the plaintext UsernameToken WS-SecurityPolicy is enabled, allows remote attackers to bypass authentication via a security header of a SOAP request containing a UsernameToken element that lacks a password child element.
https://exchange.xforce.ibmcloud.com/vulnerabilities/81981
http://www.securityfocus.com/bid/57876
http://svn.apache.org/viewvc?view=revision&revision=1438424
http://secunia.com/advisories/51988
http://seclists.org/fulldisclosure/2013/Feb/39
http://rhn.redhat.com/errata/RHSA-2013-0749.html
http://packetstormsecurity.com/files/120214/Apache-CXF-WS-Security-UsernameToken-Bypass.html