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.
Cross-site scripting (XSS) vulnerability in httprint v202, and possibly other versions before v301, allows remote attackers to inject arbitrary web script or HTML via the Server field in an HTTP response, which is not sanitized before being displayed to the user.
httprint v202, and possibly other versions before v301, allows remote attackers to cause a denial of service (crash) via a long Server field in an HTTP response.