MDaemon Webmail 14.x through 18.x before 18.5.2 has XSS (issue 2 of 2).

MDaemon Webmail 14.x through 18.x before 18.5.2 has XSS (issue 1 of 2).

MDaemon Email Server 17.5.1 allows XSS via the filename of an attachment to an email message.

MDaemon Email Server 19 through 20.0.1 skips SpamAssassin checks by default for e-mail messages larger than 2 MB (and limits checks to 10 MB even with special configuration), which is arguably inconsistent with currently popular message sizes. This might interfere with risk management for malicious e-mail, if a customer deploys a server with sufficient resources to scan large messages.

MDaemon Webmail (formerly WorldClient) has CSRF.