thttpd 2.25b0 writes data to a log file without sanitizing non-printable characters, which might allow remote attackers to modify a window's title, or possibly execute arbitrary commands or overwrite files, via an HTTP request containing an escape sequence for a terminal emulator.

thttpd HTTP server 2.03 and earlier allows remote attackers to read arbitrary files via a GET request with more than one leading / (slash) character in the filename.

Buffer overflow in thttpd HTTP server before 2.04-31 allows remote attackers to execute arbitrary commands via a long date string, which is not properly handled by the tdate_parse function.