CVE-2021-22877

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{"affected": [{"affectedData": [{"product": "Nextcloud Server", "vendor": "n/a", "versions": [{"status": "affected", "version": "Fixed in 20.0.6"}]}], "source": "support@hackerone.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:*", "matchCriteriaId": "6FEA4E5F-306F-4E45-AB46-C232BCB0F4EB", "versionEndExcluding": "20.0.6", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*", "matchCriteriaId": "A930E247-0B43-43CB-98FF-6CE7B8189835", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A missing user check in Nextcloud prior to 20.0.6 inadvertently populates a user's own credentials for other users external storage configuration when not already configured yet."}, {"lang": "es", "value": "Una falta de comprobaci\u00f3n de usuario en Nextcloud versiones anteriores a 20.0.6, inadvertidamente llena las propias credenciales del usuario para la configuraci\u00f3n del almacenamiento externo de otros usuarios cuando a\u00fan no est\u00e1n configuradas"}], "id": "CVE-2021-22877", "lastModified": "2026-06-17T03:37:55.910", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "SINGLE", "availabilityImpact": "NONE", "baseScore": 5.5, "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:L/Au:S/C:P/I:P/A:N", "version": "2.0"}, "exploitabilityScore": 8.0, "impactScore": 4.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "HIGH", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 1.2, "impactScore": 5.2, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2021-03-03T18:15:14.707", "references": [{"source": "support@hackerone.com", "tags": ["Exploit", "Issue Tracking", "Patch", "Third Party Advisory"], "url": "https://github.com/nextcloud/server/issues/24600"}, {"source": "support@hackerone.com", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/nextcloud/server/pull/25224"}, {"source": "support@hackerone.com", "tags": ["Issue Tracking", "Third Party Advisory"], "url": "https://hackerone.com/reports/1061591"}, {"source": "support@hackerone.com", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L6BO6P6MP2MOWA6PZRXX32PLWPXN5O4S/"}, {"source": "support@hackerone.com", "tags": ["Broken Link", "Vendor Advisory"], "url": "https://nextcloud.com/security/advisory/?id=NC-SA-2021-004"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Issue Tracking", "Patch", "Third Party Advisory"], "url": "https://github.com/nextcloud/server/issues/24600"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/nextcloud/server/pull/25224"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Issue Tracking", "Third Party Advisory"], "url": "https://hackerone.com/reports/1061591"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L6BO6P6MP2MOWA6PZRXX32PLWPXN5O4S/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Broken Link", "Vendor Advisory"], "url": "https://nextcloud.com/security/advisory/?id=NC-SA-2021-004"}], "sourceIdentifier": "support@hackerone.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-284"}], "source": "support@hackerone.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-862"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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