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.

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.

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.

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.