CRLF injection vulnerability in FormMail.pl in Matt Wright FormMail 1.92, and possibly earlier, allows remote attackers to inject arbitrary HTTP headers and conduct HTTP response splitting attacks via the redirect parameter.

Matt Wright FormMail 1.9 and earlier allows remote attackers to send spam or anonymous e-mail by injecting a newline character followed by CC:, BCC:, or additional TO: fields in the email and realname CGI variables.

Matt Wright FormMail 1.9 and earlier allows remote attackers to bypass the HTTP_REFERER check and conduct unauthorized activities via (1) a blank referer, (2) a spoofed referer with a trusted domain/URL after the beginning of the referer, or (3) a spoofed referer with a trusted domain/URL in the beginning (hostname) portion of the referer.