Multiple cross-site scripting (XSS) vulnerabilities in IceWarp eMail Server and WebMail Server before 9.4.2 allow remote attackers to inject arbitrary web script or HTML via (1) the body of a message, related to the email view and incorrect HTML filtering in the cleanHTML function in server/inc/tools.php; or the (2) title, (3) link, or (4) description element in an RSS feed, related to the getHTML function in server/inc/rss/item.php.

CRLF injection vulnerability in the Forgot Password implementation in server/webmail.php in IceWarp eMail Server and WebMail Server before 9.4.2 makes it easier for remote attackers to trick a user into disclosing credentials via CRLF sequences preceding a Reply-To header in the subject element of an XML document, as demonstrated by triggering an e-mail message from the server that contains a user's correct credentials, and requests that the user compose a reply that includes this message.

Multiple SQL injection vulnerabilities in the search form in server/webmail.php in the Groupware component in IceWarp eMail Server and WebMail Server before 9.4.2 allow remote authenticated users to execute arbitrary SQL commands via the (1) sql and (2) order_by elements in an XML search query.

MERAK Mail Server 7.6.0 with Icewarp Web Mail 5.3.0 allows remote authenticated users to gain sensitive information via an HTTP request to (1) calendar_d.html, (2) calendar_m.html, (3) calendar_w.html, or (4) calendar_y.html, which reveal the installation path.

MERAK Mail Server 7.6.0 with Icewarp Web Mail 5.3.0 and Mail Server 7.6.4r with Icewarp Mail Server 5.3.2 uses weak encryption in the (1) users.cfg, (2) settings.cfg, (3) users.dat or (4) user.dat files, which allows local users to extract the passwords.