{"id":"CVE-2017-0881","aliases":["EUVD-2017-1235","GHSA-435h-5vch-xh86"],"status":"published","title":"An error in the implementation of an autosubscribe feature in the check_stream_exists route of...","description":"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. The issue affects all previously released versions of the Zulip server.","severity":{"version":"3.0","score":4.3,"vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.01103,"percentile":0.65941,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-200","CWE-863"],"published":"2017-03-28T02:46:00Z","modified":"2026-10-20T10:48:05Z","products":[{"vendor":"zulip","product":"zulip_server"}],"references":[{"url":"http://www.securityfocus.com/bid/97159","tags":["vdb-entry","x_refsource_BID","x_transferred","Third Party Advisory","Vendor Advisory","advisory"]},{"url":"https://groups.google.com/d/msg/zulip-announce/VyawgRuoY34/NTBwnTArGwAJ","tags":["x_refsource_MISC","x_transferred","Patch","Release Notes","Third Party Advisory","fix"]},{"url":"https://github.com/zulip/zulip/commit/7ecda1ac8e26d8fb3725e954b2dc4723dda2255f","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory","fix"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2017-0881"},{"url":"https://github.com/advisories/GHSA-435h-5vch-xh86"}],"sources":{"cve":[{"id":"CVE-2017-0881","description":"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. The issue affects all previously released versions of the Zulip server.","status":"published","published":"2017-03-28T02:46:00Z","modified":"2024-08-05T13:18:06.509Z","cwes":["CWE-200"],"updated_at":"2026-11-02T14:33:22.381225Z"}],"euvd":[{"id":"EUVD-2017-1235","description":"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. The issue affects all previously released versions of the Zulip server.","status":"published","published":"2017-03-28T02:46:00Z","modified":"2024-08-05T13:18:06Z","updated_at":"2026-11-03T02:39:22.969866Z"}],"ghsa":[{"id":"GHSA-435h-5vch-xh86","title":"An error in the implementation of an autosubscribe feature in the check_stream_exists route of...","description":"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. The issue affects all previously released versions of the Zulip server.","status":"published","published":"2022-05-13T01:38:28Z","modified":"2025-04-20T03:34:58Z","cvss":[{"version":"3.0","score":4.3,"vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","level":"medium"}],"cwes":["CWE-200","CWE-863"],"updated_at":"2026-11-02T15:01:42.453698Z"}],"nvd":[{"id":"CVE-2017-0881","description":"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. The issue affects all previously released versions of the Zulip server.","status":"published","published":"2017-03-28T02:59:01.463Z","modified":"2026-06-17T00:58:27.357Z","cvss":[{"version":"3.0","score":4.3,"vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":4,"vector":"AV:N/AC:L/Au:S/C:P/I:N/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-200","CWE-863"],"updated_at":"2026-11-02T14:03:44.275273Z"}],"osv":[{"id":"CVE-2017-0881","description":"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. The issue affects all previously released versions of the Zulip server.","status":"published","published":"2017-03-28T02:59:01.463Z","modified":"2026-10-20T10:48:05.930937873Z","cvss":[{"version":"3.0","score":4.3,"vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:44:03.472693Z"}]}}