CVE-2017-18894

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{"affected": [{"affectedData": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "source": "cve@mitre.org"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*", "matchCriteriaId": "8DABD3D9-ABA0-435A-826E-894B85BF330B", "versionEndExcluding": "4.0.5", "vulnerable": true}, {"criteria": "cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*", "matchCriteriaId": "C98DA462-E8C3-4011-995F-1D813670A5F7", "versionEndExcluding": "4.1.1", "versionStartIncluding": "4.1.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:mattermost:mattermost_server:4.2.0:rc1:*:*:*:*:*:*", "matchCriteriaId": "DBCAAA7B-C893-48F1-B72C-06101B26EA48", "vulnerable": true}, {"criteria": "cpe:2.3:a:mattermost:mattermost_server:4.2.0:rc2:*:*:*:*:*:*", "matchCriteriaId": "7103DBD3-7169-4EF7-8354-122E98FBE442", "vulnerable": true}, {"criteria": "cpe:2.3:a:mattermost:mattermost_server:4.2.0:rc3:*:*:*:*:*:*", "matchCriteriaId": "C1F4BE86-1DEE-4730-8CC6-64A05A0C85EA", "vulnerable": true}, {"criteria": "cpe:2.3:a:mattermost:mattermost_server:4.2.0:rc4:*:*:*:*:*:*", "matchCriteriaId": "B725A0DC-8A41-4788-A705-2EE23EE13009", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "An issue was discovered in Mattermost Server before 4.2.0, 4.1.1, and 4.0.5, when used as an OAuth 2.0 service provider. Sometimes. resource-owner authorization is bypassed, allowing account takeover."}, {"lang": "es", "value": "Se detect\u00f3 un problema en Mattermost Server versiones anteriores a 4.2.0, 4.1.1 y 4.0.5, cuando se usaba como proveedor de servicios OAuth versi\u00f3n 2.0. Algunas veces, es omitida la autorizaci\u00f3n del propietario del recurso, lo que permite la toma de control de la cuenta"}], "id": "CVE-2017-18894", "lastModified": "2026-06-17T01:13:47.107", "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": 8.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.2, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2020-06-19T19:15:10.967", "references": [{"source": "cve@mitre.org", "tags": ["Vendor Advisory"], "url": "https://mattermost.com/security-updates/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://mattermost.com/security-updates/"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-732"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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