{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-06-17T18:47:44.784","vulnerabilities":[{"cve":{"id":"CVE-2017-0881","sourceIdentifier":"support@hackerone.com","published":"2017-03-28T02:59:01.463","lastModified":"2026-06-17T00:58:27.357","vulnStatus":"Modified","cveTags":[],"descriptions":[{"lang":"en","value":"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."},{"lang":"es","value":"Un error en la implementación de una función de suscripción automática en la ruta check_stream_exists del servidor de aplicaciones de chat en grupo Zulip en versiones anteriores a 1.4.3 permitió a un usuario autenticado suscribirse a un flujo privado que debería haber requerido una invitación de un miembro existente para unirse. El problema afecta a todas las versiones liberadas anteriormente del servidor Zulip."}],"affected":[{"source":"support@hackerone.com","affectedData":[{"vendor":"n/a","product":"Zulip Server Versions 1.4.2 and below","versions":[{"version":"Zulip Server Versions 1.4.2 and below","status":"affected"}]}]}],"metrics":{"cvssMetricV30":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.0","vectorString":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","baseScore":4.3,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"LOW","integrityImpact":"NONE","availabilityImpact":"NONE"},"exploitabilityScore":2.8,"impactScore":1.4}],"cvssMetricV2":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"2.0","vectorString":"AV:N/AC:L/Au:S/C:P/I:N/A:N","baseScore":4.0,"accessVector":"NETWORK","accessComplexity":"LOW","authentication":"SINGLE","confidentialityImpact":"PARTIAL","integrityImpact":"NONE","availabilityImpact":"NONE"},"baseSeverity":"MEDIUM","exploitabilityScore":8.0,"impactScore":2.9,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":false}]},"weaknesses":[{"source":"support@hackerone.com","type":"Secondary","description":[{"lang":"en","value":"CWE-200"}]},{"source":"nvd@nist.gov","type":"Primary","description":[{"lang":"en","value":"CWE-863"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:zulip:zulip_server:*:*:*:*:*:*:*:*","versionEndExcluding":"1.4.3","matchCriteriaId":"C798D82E-5E3A-4784-9D67-3977B15FE8D5"}]}]}],"references":[{"url":"http://www.securityfocus.com/bid/97159","source":"support@hackerone.com","tags":["Third Party Advisory","Vendor Advisory"]},{"url":"https://github.com/zulip/zulip/commit/7ecda1ac8e26d8fb3725e954b2dc4723dda2255f","source":"support@hackerone.com","tags":["Patch","Third Party Advisory"]},{"url":"https://groups.google.com/d/msg/zulip-announce/VyawgRuoY34/NTBwnTArGwAJ","source":"support@hackerone.com","tags":["Patch","Release Notes","Third Party Advisory"]},{"url":"http://www.securityfocus.com/bid/97159","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Third Party Advisory","Vendor Advisory"]},{"url":"https://github.com/zulip/zulip/commit/7ecda1ac8e26d8fb3725e954b2dc4723dda2255f","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch","Third Party Advisory"]},{"url":"https://groups.google.com/d/msg/zulip-announce/VyawgRuoY34/NTBwnTArGwAJ","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch","Release Notes","Third Party Advisory"]}]}}]}