Pi3Web 2.0.3 before PL2, when installed on Windows as a desktop application and without using the Pi3Web/Conf/Intenet.pi3, allows remote attackers to cause a denial of service (crash or hang) and obtain the full pathname of the server via a request to a file in the ISAPI directory that is not an executable DLL, which triggers the crash when the DLL load fails, as demonstrated using Isapi\users.txt.
https://www.exploit-db.com/exploits/7109
https://exchange.xforce.ibmcloud.com/vulnerabilities/46600
http://www.securityfocus.com/archive/1/498771
http://www.securityfocus.com/archive/1/498770
http://www.securityfocus.com/archive/1/498602
http://www.securityfocus.com/archive/1/498575
http://secunia.com/advisories/32696
http://archives.neohapsis.com/archives/bugtraq/2008-11/0171.html