{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2025-12419",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2025-12419",
    "idYear": 2025,
    "status": "PUBLISHED",
    "publishedAt": "2025-11-27T15:55:44.815Z",
    "updatedAt": "2026-02-26T16:07:27.036Z",
    "importedAt": "2026-10-24T01:57:24.991Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "Account takeover on OAuth/OpenID-enabled servers",
      "summary": "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.",
      "affected": [
        {
          "vendor": "Mattermost",
          "product": "Mattermost",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "10.12.0",
              "status": "affected",
              "versionType": "semver",
              "lessThanOrEqual": "10.12.1"
            },
            {
              "version": "10.11.0",
              "status": "affected",
              "versionType": "semver",
              "lessThanOrEqual": "10.11.4"
            },
            {
              "version": "10.5.0",
              "status": "affected",
              "versionType": "semver",
              "lessThanOrEqual": "10.5.12"
            },
            {
              "version": "11.0.0",
              "status": "affected",
              "versionType": "semver",
              "lessThanOrEqual": "11.0.3"
            },
            {
              "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"
            }
          ]
        }
      ]
    }
  }
}