Citrix MetaFrame XP Server 1.0版本的login.asp存在跨站脚本（XSS）漏洞。远程攻击者借助NFuse_Message参数注入任意web脚本或者HTML。
It has been reported that Citrix has addressed this issue in the latest Metaframe update, which is said to be available from the following URL. This has not been verified by Symantec. http://www.mycitrix.com
Citrix Metaframe XP Cross-site Scripting Vulnerability (EDBID:23316)
Citrix Metaframe XP is prone to cross-site scripting attacks when returning error messages to users. The error message is generated when invalid authentication credentials are transmitted to the log-in page. Exploitation of this issue could potentially result in the theft of cookie-based authentication credentials, or other attacks.
MessageType=Error&NFuse_Message=<SCRIPT>alert("Vulnerable to XSS")</SCRIPT>
Citrix MetaFrame XP login.asp NFuse_Message Parameter XSS
Remote / Network Access
Loss of Integrity
Citrix MetaFrame XP version 1.0 contains a flaw that allows a remote cross site scripting attack. This flaw exists because the application does not validate the "NFuse_Message" variable parameters when generating error messages. This could allow a user to create a specially crafted URL that would execute arbitrary code in a user's browser within the trust relationship between the browser and the server, leading to a loss of integrity.
Currently, there are no known workarounds or upgrades to correct this issue. However, Citrix Systems has released a patch to address this vulnerability.