{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2025-12419", "assignerOrgId": "9302f53e-dde5-4bf3-b2f2-a83f91ac0eee", "state": "PUBLISHED", "assignerShortName": "Mattermost", "dateReserved": "2025-10-28T16:09:58.730Z", "datePublished": "2025-11-27T15:55:44.815Z", "dateUpdated": "2025-11-27T17:18:07.520Z"}, "containers": {"cna": {"affected": [{"defaultStatus": "unaffected", "product": "Mattermost", "vendor": "Mattermost", "versions": [{"lessThanOrEqual": "10.12.1", "status": "affected", "version": "10.12.0", "versionType": "semver"}, {"lessThanOrEqual": "10.11.4", "status": "affected", "version": "10.11.0", "versionType": "semver"}, {"lessThanOrEqual": "10.5.12", "status": "affected", "version": "10.5.0", "versionType": "semver"}, {"lessThanOrEqual": "11.0.3", "status": "affected", "version": "11.0.0", "versionType": "semver"}, {"version": "11.1.0", "status": "unaffected"}, {"version": "10.12.2", "status": "unaffected"}, {"version": "10.11.5", "status": "unaffected"}, {"version": "10.5.13", "status": "unaffected"}, {"version": "11.0.4", "status": "unaffected"}]}], "credits": [{"lang": "en", "type": "finder", "value": "daw10"}], "descriptions": [{"lang": "en", "value": "Mattermost versions 10.12.x <= 10.12.1, 10.11.x <= 10.11.4, 10.5.x <= 10.5.12, 11.0.x <= 11.0.3 fail to properly validate OAuth state tokens during OpenID Connect authentication which allows an authenticated attacker with team creation privileges to take over a user account via manipulation of authentication data during the OAuth completion flow. This requires email verification to be disabled (default: disabled), OAuth/OpenID Connect to be enabled, and the attacker to control two users in the SSO system with one of them never having logged into Mattermost."}], "metrics": [{"cvssV3_1": {"attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "CHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH", "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H", "baseSeverity": "CRITICAL", "baseScore": 9.9}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "description": "CWE-303: Incorrect Implementation of Authentication Algorithm", "cweId": "CWE-303"}]}], "references": [{"url": "https://mattermost.com/security-updates"}], "solutions": [{"value": "Update Mattermost to versions 11.1.0, 10.12.2, 10.11.5, 10.5.13, 11.0.4 or higher.", "lang": "en"}], "source": {"advisory": "MMSA-2025-00547", "defect": ["https://mattermost.atlassian.net/browse/MM-66371"], "discovery": "EXTERNAL"}, "title": "Account takeover on OAuth/OpenID-enabled servers", "providerMetadata": {"orgId": "9302f53e-dde5-4bf3-b2f2-a83f91ac0eee", "shortName": "Mattermost", "dateUpdated": "2025-11-27T17:18:07.520Z"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "Mattermost versions 10.12.x <= 10.12.1, 10.11.x <= 10.11.4, 10.5.x <= 10.5.12, 11.0.x <= 11.0.3 fail to properly validate OAuth state tokens during OpenID Connect authentication which allows an authenticated attacker with team creation privileges to take over a user account via manipulation of authentication data during the OAuth completion flow. This requires email verification to be disabled (default: disabled), OAuth/OpenID Connect to be enabled, and the attacker to control two users in the SSO system with one of them never having logged into Mattermost."}], "id": "CVE-2025-12419", "lastModified": "2025-11-27T18:15:45.890", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.9, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.1, "impactScore": 6.0, "source": "[email protected]", "type": "Secondary"}]}, "published": "2025-11-27T16:15:46.957", "references": [{"source": "[email protected]", "url": "https://mattermost.com/security-updates"}], "sourceIdentifier": "[email protected]", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-303"}], "source": "[email protected]", "type": "Secondary"}]}

{}