cgiemail allows remote attackers to use cgiemail as a spam proxy via CRLF injection of encoded newline (%0a) characters in parameters such as "required-subject," which can be used to modify the CC, BCC, and other header fields in the generated email message.

Buffer overflow in cgicso.c for cgiemail 1.6 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a long query parameter.