Stack-based buffer overflow in FORM2RAW.exe in Alt-N MDaemon 6.5.2 through 6.8.5 allows remote attackers to execute arbitrary code via a long From parameter to Form2Raw.cgi.

MDaemon Mail Server 23.5.2 validates SPF, DKIM, and DMARC using the email enclosed in angle brackets (<>) in the From: header of SMTP DATA. An attacker can craft a From: header with multiple invisible Unicode thin spaces to display a spoofed sender while passing validation, allowing email spoofing even when anti-spoofing protections are in place. NOTE: this is disputed by the Supplier because UI spoofing occurs in a client, not in a server such as MDaemon's product or any other server implementation. Also, if a client without its own spoofing protection must be used, the Header Screening feature in MDaemon's product can be employed to mitigate the client-side vulnerability.

An XSS issue was discovered in MDaemon Email Server version 25.0.1 and below. An attacker can send a specially crafted HTML e-mail message with JavaScript in an img tag. This could allow a remote attacker to load arbitrary JavaScript code in the context of a webmail user's browser window, and access user data.

Alt-N Technologies Mdaemon 5.0 through 5.0.6 uses a weak encryption algorithm to store user passwords, which allows local users to crack passwords.

An XSS issue was discovered in

MDaemon Email Server before version 24.5.1c. An attacker can send an HTML e-mail message with JavaScript in an img tag. This could allow a remote attacker

to load arbitrary JavaScript code in the context of a webmail user's browser window.

MDaemon SecurityGateway through 9.0.3 allows XSS via a crafted Message Content Filtering rule. This might allow domain administrators to conduct attacks against global administrators.