Vulnerabilities > Zulip > Zulip Server
| DATE | CVE | VULNERABILITY TITLE | RISK |
|---|---|---|---|
| 2017-03-28 | CVE-2017-0881 | Incorrect Authorization vulnerability in Zulip Server An error in the implementation of an autosubscribe feature in the check_stream_exists route of the Zulip group chat application server before 1.4.3 allowed an authenticated user to subscribe to a private stream that should have required an invitation from an existing member to join. | 4.3 |