The default configuration of the Sun Java web server 2.0 and earlier allows remote attackers to execute arbitrary commands by uploading Java code to the server via board.html, then directly calling the JSP compiler servlet.
https://euvd.enisa.europa.eu/vulnerability/EUVD-2000-0625
http://www.sun.com/software/jwebserver/faq/jwsca-2000-02.html
http://www.securityfocus.com/bid/1459
http://archives.neohapsis.com/archives/bugtraq/2000-07/0163.html