The STARTTLS implementation in MailMarshal before 7.2 allows plaintext command injection.

The password reset feature in the Spam Quarantine HTTP interface for MailMarshal SMTP 6.2.0.x before 6.2.1 allows remote attackers to modify arbitrary account information via a UserId variable with a large amount of trailing whitespace followed by a malicious value, which triggers SQL buffer truncation due to length inconsistencies between variables.

Directory traversal vulnerability in Marshal MailMarshal SMTP 5.x, 6.x, and 2006, and MailMarshal for Exchange 5.x, allows remote attackers to write arbitrary files via ".." sequences in filenames in an ARJ compressed archive.