{
  "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-2024-42406",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2024-42406",
    "idYear": 2024,
    "status": "PUBLISHED",
    "publishedAt": "2024-09-26T08:04:22.939Z",
    "updatedAt": "2024-09-26T13:11:34.682Z",
    "importedAt": "2026-10-24T01:57:16.009Z",
    "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": "Unauthorized access on archived channels",
      "summary": "Mattermost versions 9.11.x <= 9.11.0, 9.10.x <= 9.10.1, 9.9.x <= 9.9.2 and 9.5.x <= 9.5.8 fail to properly authorize requests when viewing archived channels is disabled, which allows an attacker to retrieve post and file information about archived channels. Examples are flagged or unread posts as well as files.",
      "affected": [
        {
          "vendor": "Mattermost",
          "product": "Mattermost",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "9.11.0",
              "status": "affected"
            },
            {
              "version": "9.10.0",
              "status": "affected",
              "versionType": "semver",
              "lessThanOrEqual": "9.10.1"
            },
            {
              "version": "9.9.0",
              "status": "affected",
              "versionType": "semver",
              "lessThanOrEqual": "9.9.2"
            },
            {
              "version": "9.5.0",
              "status": "affected",
              "versionType": "semver",
              "lessThanOrEqual": "9.5.8"
            },
            {
              "version": "10.0.0",
              "status": "unaffected"
            },
            {
              "version": "9.11.1",
              "status": "unaffected"
            },
            {
              "version": "9.10.2",
              "status": "unaffected"
            },
            {
              "version": "9.9.3",
              "status": "unaffected"
            },
            {
              "version": "9.5.9",
              "status": "unaffected"
            }
          ]
        }
      ]
    }
  }
}