JBOSS 3.2.2 through 3.2.7 and 4.0.2 allows remote attackers to obtain sensitive information via a GET request (1) with a "%." (percent dot), which reveals the installation path or (2) with a % (percent) before a filename, which reveals the contents of the file.
http://www1.itrc.hp.com/service/cki/docDisplay.do?docId=c00597967
http://www.vupen.com/english/advisories/2006/0497
http://www.vupen.com/english/advisories/2005/0815
http://www.securityfocus.com/bid/13985
http://www.securityfocus.com/archive/1/440641/100/100/threaded
http://securitytracker.com/id?1015605
http://securityreason.com/securityalert/439
http://secunia.com/advisories/18789
http://secunia.com/advisories/17559
http://secunia.com/advisories/15746
http://marc.info/?l=bugtraq&m=111911095424496&w=2
http://archives.neohapsis.com/archives/fulldisclosure/2006-07/0424.html