{
  "cveId": "CVE-2021-38505",
  "url": "https://patchblox.com/security/cve/CVE-2021-38505",
  "summary": "CVE-2021-38505 is fixed in 2 products on 1 platform, first by Mozilla Thunderbird (en-US) 91.3.0, released November 1, 2021. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "Mozilla Firefox ESR and 3 others: Microsoft introduced a new feature in Windows 10 known as Cloud Clipboard which, if enabled, will record\u2026",
  "description": "Microsoft introduced a new feature in Windows 10 known as Cloud Clipboard which, if enabled, will record data copied to the clipboard to the cloud, and make it available on other computers in certain scenarios. Applications that wish to prevent copied data from being recorded in Cloud History must use specific clipboard formats; and Firefox before versions 94 and ESR 91.3 did not implement them. This could have caused sensitive data to be recorded to a user\u0027s Microsoft account. *This bug only affects Firefox for Windows 10\u002B with Cloud Clipboard enabled. Other operating systems are unaffected.*. This vulnerability affects Firefox \u003C 94, Thunderbird \u003C 91.3, and Firefox ESR \u003C 91.3.",
  "published": "2021-12-08T22:15:08Z",
  "severity": "",
  "cvss": 6.5,
  "epss": 0.01084,
  "epssPercentile": 0.65456,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://nvd.nist.gov/vuln/detail/CVE-2021-38505",
  "fixes": [
    {
      "platform": "windows-app",
      "product": "Mozilla Firefox ESR (en-US)",
      "fixedVersion": "102.0",
      "fix": "Mozilla Firefox ESR (en-US) 102.0",
      "url": "https://patchblox.com/security/fix/windows-app/mozilla.firefox.esr-102.0",
      "released": "2022-06-23T00:00:00Z"
    },
    {
      "platform": "windows-app",
      "product": "Mozilla Thunderbird (en-US)",
      "fixedVersion": "91.3.0",
      "fix": "Mozilla Thunderbird (en-US) 91.3.0",
      "url": "https://patchblox.com/security/fix/windows-app/mozilla.thunderbird-91.3.0",
      "released": "2021-11-01T00:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T07:25:28Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}