CVE-2000-1060
The default configuration of XFCE 3.5.1 bypasses the Xauthority access control mechanism with an "xhost + localhost" command in the xinitrc program, which allows local users to sniff X Windows traffic and gain privileges.
Date published : 2001-01-22
http://www.securityfocus.com/bid/1736
http://archives.neohapsis.com/archives/bugtraq/2000-10/0022.html