Cross-site scripting (XSS) vulnerability in Novell NetWare Enterprise Web Server 5.1 and 6.0 allows remote attackers to process arbitrary script or HTML as other users via (1) a malformed request for a Perl program with script in the filename, (2) the User.id parameter to the webacc servlet, (3) the GWAP.version parameter to webacc, or (4) a URL request for a .bas file with script in the filename.