MailEnable Enterprise Premium 10.23 was vulnerable to XML External Entity Injection (XXE) attacks that could be exploited by an unauthenticated user. It was possible for an attacker to use a vulnerability in the configuration of the XML processor to read any file on the host system. Because all credentials were stored in a cleartext file, it was possible to steal all users' credentials (including the highest privileged users).
In MailEnable Enterprise Premium 10.23, the potential cross-site request forgery (CSRF) protection mechanism was not implemented correctly and it was possible to bypass it by removing the anti-CSRF token parameter from the request. This could allow an attacker to manipulate a user into unwittingly performing actions within the application (such as sending email, adding contacts, or changing settings) on behalf of the attacker.
MailEnable before 8.60 allows Directory Traversal for reading the messages of other users, uploading files, and deleting files because "/../" and "/.. /" are mishandled.
MailEnable before 8.60 allows Privilege Escalation because admin accounts could be created as a consequence of %0A mishandling in AUTH.TAB after a password-change request.
Multiple cross-site scripting (XSS) vulnerabilities in MailEnable Enterprise 6.5 allow remote attackers to inject arbitrary web script or HTML via the (1) From, (2) To, or (3) Subject header or (4) body in an SMTP e-mail message.
Cross-site scripting (XSS) vulnerability in ForgottenPassword.aspx in MailEnable Professional, Enterprise, and Premium 4.26 and earlier, 5.x before 5.53, and 6.x before 6.03 allows remote attackers to inject arbitrary web script or HTML via the Username parameter.
The SMTP service (MESMTPC.exe) in MailEnable 3.x and 4.25 does not properly perform a length check, which allows remote attackers to cause a denial of service (crash) via a long (1) email address in the MAIL FROM command, or (2) domain name in the RCPT TO command, which triggers an "unhandled invalid parameter error."
MailEnable Professional 3.5.2 and Enterprise 3.52 allow remote attackers to cause a denial of service (crash) via multiple IMAP connection requests to the same folder.