SuperWebMailer 7.21.0.01526 is susceptible to a remote code execution vulnerability in the Language parameter of mailingupgrade.php. An unauthenticated remote attacker can exploit this behavior to execute arbitrary PHP code via Code Injection.
Cross-site scripting (XSS) vulnerability in defaultnewsletter.php in SuperWebMailer 5.60.0.01190 and earlier allows remote attackers to inject arbitrary web script or HTML via the HTMLForm parameter.