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.

Pi3Web Web Server 2.0.3 PL1 allows remote attackers to cause a denial of service (application exit) via a long URI. NOTE: this issue was originally reported as a crash, but the vendor states that the impact is a "clean" exit in which "the server I/O loop finishes and the process exits normally."

Pi3Web web server 2.0.2 Beta 1, when the Directory Index is configured to use the "Name" column and sort using the column title as a hyperlink, allows remote attackers to cause a denial of service (crash) via a malformed URL to the web server, possibly involving a buffer overflow.

Buffer overflow in Pi3Web 2.0.1 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a GET request with a large number of / characters.

Pi3Web 2.0.0 allows remote attackers to view restricted files via an HTTP request containing a "*" (wildcard or asterisk) character.

CGI handler in John Roy Pi3Web for Windows 2.0 beta 1 and 2 allows remote attackers to cause a denial of service (crash) via a series of requests whose physical path is exactly 260 characters long and ends in a series of . (dot) characters.