{
  "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-2021-31408",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2021-31408",
    "idYear": 2021,
    "status": "PUBLISHED",
    "publishedAt": "2021-04-23T16:07:16.629Z",
    "updatedAt": "2024-09-17T02:06:19.701Z",
    "importedAt": "2026-10-24T01:56:32.228Z",
    "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": "Server session is not invalidated when logout() helper method of Authentication module is used in Vaadin 18-19",
      "summary": "Authentication.logout() helper in com.vaadin:flow-client versions 5.0.0 prior to 6.0.0 (Vaadin 18), and 6.0.0 through 6.0.4 (Vaadin 19.0.0 through 19.0.3) uses incorrect HTTP method, which, in combination with Spring Security CSRF protection, allows local attackers to access Fusion endpoints after the user attempted to log out.",
      "affected": [
        {
          "vendor": "Vaadin",
          "product": "Vaadin",
          "versions": [
            {
              "version": "18.0.0",
              "status": "affected",
              "versionType": "custom",
              "lessThan": "*",
              "changes": [
                {
                  "at": "19.0.0",
                  "status": "unaffected"
                },
                {
                  "at": "19.0.0",
                  "status": "affected"
                }
              ]
            }
          ]
        },
        {
          "vendor": "Vaadin",
          "product": "flow-client",
          "versions": [
            {
              "version": "5.0.0",
              "status": "affected",
              "versionType": "custom",
              "lessThan": "*",
              "changes": [
                {
                  "at": "6.0.0",
                  "status": "unaffected"
                },
                {
                  "at": "6.0.0",
                  "status": "affected"
                }
              ]
            }
          ]
        }
      ]
    }
  }
}