Cross-site scripting (XSS) vulnerability in cookieauth.dll in the HTML forms authentication component in Microsoft Forefront Threat Management Gateway, Medium Business Edition (TMG MBE); and Internet Security and Acceleration (ISA) Server 2006, 2006 Supportability Update, and 2006 SP1; allows remote attackers to inject arbitrary web script or HTML via "authentication input" to this component, aka "Cross-Site Scripting Vulnerability."
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5771
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-016
http://www.vupen.com/english/advisories/2009/1030
http://www.us-cert.gov/cas/techalerts/TA09-104A.html
http://www.securitytracker.com/id?1022046