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.