CVE-2019-20844

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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": "4A5BE0A1-194D-4E16-8547-2290F3BF777D", "versionEndExcluding": "5.9.7", "vulnerable": true}, {"criteria": "cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*", "matchCriteriaId": "87675506-EA42-48F1-B12B-C137D58A31BC", "versionEndExcluding": "5.15.4", "versionStartIncluding": "5.15.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*", "matchCriteriaId": "88A5E809-55F9-4B8C-8CC9-D2263632626E", "versionEndExcluding": "5.16.4", "versionStartIncluding": "5.16.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*", "matchCriteriaId": "1861A510-327D-452B-A4FA-12204ECA2358", "versionEndExcluding": "5.17.2", "versionStartIncluding": "5.17.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:mattermost:mattermost_server:5.18.0:rc1:*:*:*:*:*:*", "matchCriteriaId": "5966FFD8-6763-48E0-85A3-6624241F6FAB", "vulnerable": true}, {"criteria": "cpe:2.3:a:mattermost:mattermost_server:5.18.0:rc2:*:*:*:*:*:*", "matchCriteriaId": "51C15C53-6CCF-4A49-AAF2-88AE72E2216F", "vulnerable": true}, {"criteria": "cpe:2.3:a:mattermost:mattermost_server:5.18.0:rc3:*:*:*:*:*:*", "matchCriteriaId": "F46E3522-C7EB-4139-84F5-AFCED85D3C19", "vulnerable": true}, {"criteria": "cpe:2.3:a:mattermost:mattermost_server:5.18.0:rc4:*:*:*:*:*:*", "matchCriteriaId": "7A353365-71E8-4382-9212-BD4495F5CF7E", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "An issue was discovered in Mattermost Server before 5.18.0, 5.17.2, 5.16.4, 5.15.4, and 5.9.7. An attacker can spoof a direct-message channel by changing the type of a channel."}, {"lang": "es", "value": "Se detect\u00f3 un problema en Mattermost Server versiones anteriores a 5.18.0, 5.17.2, 5.16.4, 5.15.4 y 5.9.7. Un atacante puede suplantar un canal de mensaje directo al cambiar el tipo de canal"}], "id": "CVE-2019-20844", "lastModified": "2026-06-17T02:31:18.290", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "MEDIUM", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "NONE", "baseScore": 4.3, "confidentialityImpact": "NONE", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:N", "version": "2.0"}, "exploitabilityScore": 8.6, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": true}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2020-06-19T14:15:10.510", "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-924"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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