Unknown vulnerability in Jigsaw before 2.2.4 has unknown impact and attack vectors, possibly related to the parsing of the URI.

Cross-site scripting (XSS) vulnerability in W3C Jigsaw Proxy Server before 2.2.1 allows remote attackers to execute arbitrary script via a URL that contains a reference to a nonexistent host followed by the script, which is included in the resulting error message.

Jigsaw 2.2.1 on Windows systems allows remote attackers to use MS-DOS device names in HTTP requests to (1) cause a denial of service using the "con" device, or (2) obtain the physical path of the server using two requests to the "aux" device.