Cross-site scripting (XSS) vulnerability in main.php in Chipmailer 1.09 allows remote attackers to inject arbitrary web script or HTML via the (1) name, (2) betreff, (3) mail, and (4) text parameters.

The Data function in class.smtp.php in PHPMailer 1.7.2 and earlier allows remote attackers to cause a denial of service (infinite loop leading to memory and CPU consumption) via a long header field.

Buffer overflow in ZMailer before 2.99.51_1 allows remote attackers to execute arbitrary code during HELO processing from an IPv6 address, possibly using an address that resolves to a long hostname.

nullmailer 1.00RC5 and earlier allows local users to cause a denial of service via an email to a local user that does not exist, which generates an error that causes nullmailer to stop sending mail to all users.

Buffer overflow in Claris Emailer 2.0v2 allows remote attackers to cause a denial of service and possibly execute arbitrary code via an email attachment with a long filename.

CGIMail.exe CGI program in Stalkerlab Mailers 1.1.2 allows remote attackers to read arbitrary files by specifying the file in the $Attach$ hidden form variable.