Improper neutralization of special elements used in an OS command ('OS Command Injection') issue exists in acmailer CGI ver.4.0.3 and earlier and acmailer DB ver.1.1.5 and earlier. If this vulnerability is exploited, an arbitrary OS command may be executed by an attacker.

Cross-site scripting vulnerability exists in acmailer CGI ver.4.0.5 and earlier. An arbitrary script may be executed on the web browser of the user who accessed the management page of the affected product.