CVE-2018-21252

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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": "BB47FDC1-2502-4123-B72B-E741AE360939", "versionEndExcluding": "4.10.3", "vulnerable": true}, {"criteria": "cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*", "matchCriteriaId": "E77175BB-85E2-4F4D-8BF1-6BD74224CCBD", "versionEndExcluding": "5.0.3", "versionStartIncluding": "5.0.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*", "matchCriteriaId": "8EBEC3A7-1291-4C7E-BBA9-88ADB5EBE94D", "versionEndExcluding": "5.1.1", "versionStartIncluding": "5.1.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:mattermost:mattermost_server:5.2.0:rc1:*:*:*:*:*:*", "matchCriteriaId": "4278AE6D-09CF-4E82-B728-EDD1DFD6C4D0", "vulnerable": true}, {"criteria": "cpe:2.3:a:mattermost:mattermost_server:5.2.0:rc2:*:*:*:*:*:*", "matchCriteriaId": "094E718B-6916-4473-A289-5CA8A1291969", "vulnerable": true}, {"criteria": "cpe:2.3:a:mattermost:mattermost_server:5.2.0:rc3:*:*:*:*:*:*", "matchCriteriaId": "6188A07E-A8A2-4573-9882-7FEF4316D688", "vulnerable": true}, {"criteria": "cpe:2.3:a:mattermost:mattermost_server:5.2.0:rc4:*:*:*:*:*:*", "matchCriteriaId": "3D223D23-FE0B-44A5-AEC3-F6935AFFBC0D", "vulnerable": true}, {"criteria": "cpe:2.3:a:mattermost:mattermost_server:5.2.0:rc5:*:*:*:*:*:*", "matchCriteriaId": "F3807BAF-FEE4-4A35-8CDA-E3BE991BC117", "vulnerable": true}, {"criteria": "cpe:2.3:a:mattermost:mattermost_server:5.2.0:rc6:*:*:*:*:*:*", "matchCriteriaId": "5821F28D-E507-446F-98CF-9284A588E8CA", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "An issue was discovered in Mattermost Server before 5.2, 5.1.1, 5.0.3, and 4.10.3. Attackers could use multiple e-mail addresses to bypass a domain-based policy for signups."}, {"lang": "es", "value": "Se detect\u00f3 un problema en Mattermost Server versiones anteriores a 5.2, 5.1.1, 5.0.3 y 4.10.3. Los atacantes podr\u00edan usar m\u00faltiples direcciones de correo electr\u00f3nico para omitir una pol\u00edtica basada en el dominio para las suscripciones"}], "id": "CVE-2018-21252", "lastModified": "2026-06-17T01:54:28.473", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "SINGLE", "availabilityImpact": "NONE", "baseScore": 4.0, "confidentialityImpact": "NONE", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:L/Au:S/C:N/I:P/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}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 4.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 1.4, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2020-06-19T18:15:10.677", "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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