CVE-2017-0881

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{"affected": [{"affectedData": [{"product": "Zulip Server Versions 1.4.2 and below", "vendor": "n/a", "versions": [{"status": "affected", "version": "Zulip Server Versions 1.4.2 and below"}]}], "source": "support@hackerone.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:zulip:zulip_server:*:*:*:*:*:*:*:*", "matchCriteriaId": "C798D82E-5E3A-4784-9D67-3977B15FE8D5", "versionEndExcluding": "1.4.3", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "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 implementaci\u00f3n de una funci\u00f3n de suscripci\u00f3n autom\u00e1tica en la ruta check_stream_exists del servidor de aplicaciones de chat en grupo Zulip en versiones anteriores a 1.4.3 permiti\u00f3 a un usuario autenticado suscribirse a un flujo privado que deber\u00eda haber requerido una invitaci\u00f3n de un miembro existente para unirse. El problema afecta a todas las versiones liberadas anteriormente del servidor Zulip."}], "id": "CVE-2017-0881", "lastModified": "2026-06-17T00:58:27.357", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "SINGLE", "availabilityImpact": "NONE", "baseScore": 4.0, "confidentialityImpact": "PARTIAL", "integrityImpact": "NONE", "vectorString": "AV:N/AC:L/Au:S/C:P/I:N/A:N", "version": "2.0"}, "exploitabilityScore": 8.0, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV30": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 4.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N", "version": "3.0"}, "exploitabilityScore": 2.8, "impactScore": 1.4, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2017-03-28T02:59:01.463", "references": [{"source": "support@hackerone.com", "tags": ["Third Party Advisory", "Vendor Advisory"], "url": "http://www.securityfocus.com/bid/97159"}, {"source": "support@hackerone.com", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/zulip/zulip/commit/7ecda1ac8e26d8fb3725e954b2dc4723dda2255f"}, {"source": "support@hackerone.com", "tags": ["Patch", "Release Notes", "Third Party Advisory"], "url": "https://groups.google.com/d/msg/zulip-announce/VyawgRuoY34/NTBwnTArGwAJ"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory", "Vendor Advisory"], "url": "http://www.securityfocus.com/bid/97159"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/zulip/zulip/commit/7ecda1ac8e26d8fb3725e954b2dc4723dda2255f"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Release Notes", "Third Party Advisory"], "url": "https://groups.google.com/d/msg/zulip-announce/VyawgRuoY34/NTBwnTArGwAJ"}], "sourceIdentifier": "support@hackerone.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-200"}], "source": "support@hackerone.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-863"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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