kb_whois.cgi in K+B-Bestellsystem (aka KB-Bestellsystem) allows remote attackers to execute arbitrary commands via shell metacharacters in the (1) domain or (2) tld parameter in a check_owner action.
Improper Input Validation The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly.