Cross-site scripting (XSS) vulnerability in ForgottenPassword.aspx in MailEnable Professional, Enterprise, and Premium 4.26 and earlier, 5.x before 5.53, and 6.x before 6.03 allows remote attackers to inject arbitrary web script or HTML via the Username parameter.
https://exchange.xforce.ibmcloud.com/vulnerabilities/72380
http://www.mailenable.com/kb/Content/Article.asp?ID=me020567
http://www.exploit-db.com/exploits/18447
http://secunia.com/advisories/47562