CommuniGate Pro 6.2 allows stored XSS via a message body in Pronto! Mail Composer, which is mishandled in /MIME/INBOX-MM-1/ if the raw email link (in .txt format) is modified and then renamed with a .html or .wssp extension.

The "XML Interface to Messaging, Scheduling, and Signaling" (XIMSS) protocol implementation in CommuniGate Pro (CGP) 6.2 suffers from a Missing XIMSS Protocol Validation attack that leads to an email spoofing attack, allowing a malicious authenticated attacker to send a message from any source email address. The attack uses an HTTP POST request to a /Session URI, and interchanges the XML From and To elements.

The WebMail components (Crystal, pronto, and pronto4) in CommuniGate Pro before 6.2.1 have stored XSS vulnerabilities via (1) the location or details field of a Google Calendar invitation, (2) a crafted Outlook.com calendar (aka Hotmail Calendar) invitation, (3) e-mail granting access to a directory that has JavaScript in its name, (4) JavaScript in a note name, (5) JavaScript in a task name, or (6) HTML e-mail that is mishandled in the Inbox component.

Directory traversal vulnerability in CommuniGate Pro 4.0b4 and possibly earlier versions allows remote attackers to list the contents of the WebUser directory and its parent directory via a (1) .. (dot dot) or (2) . (dot) in a URL. NOTE: it is not clear whether this issue reveals any more information regarding directory structure than is already available to any CommuniGate Pro user, although there is a possibility that it could be used to infer product version information.

CommuniGate Pro 3.1 through 4.0.6 sends the session ID in the referer field for an HTTP request for an image, which allows remote attackers to hijack mail sessions via an e-mail with an IMG tag that references a malicious URL that captures the referer.

Cross-site scripting (XSS) vulnerability in the WebMail system in Stalker CommuniGate Pro 5.1.8 and earlier, when using Microsoft Internet Explorer, allows remote attackers to inject arbitrary web script or HTML via crafted STYLE tags.

CommuniGate Pro Core Server before 5.0.7 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via LDAP messages with negative BER lengths, and possibly other vectors, as demonstrated by the ProtoVer LDAP test suite.

Unknown vulnerability in the LIST functionality in CommuniGate Pro before 4.3c3 allows remote attackers to cause a denial of service (server crash) via certain multipart messages.

POP3 daemon in Stalker CommuniGate Pro 3.3.2 generates different error messages for invalid usernames versus invalid passwords, which allows remote attackers to determine valid email addresses on the server for SPAM attacks.

The web administration interface for CommuniGate Pro 3.2.5 and earlier allows remote attackers to read arbitrary files via a .. (dot dot) attack.

Buffer overflow in CommuniGatePro via a long string to the HTTP configuration port.