{
  "cveId": "CVE-2021-38492",
  "url": "https://patchblox.com/security/cve/CVE-2021-38492",
  "summary": "CVE-2021-38492 is fixed in 2 products on 1 platform, first by Mozilla Thunderbird (en-US) 91.1.2, released September 24, 2021. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "Mozilla Firefox ESR and 3 others: When delegating navigations to the operating system, Firefox would accept the \u0060mk\u0060 scheme which might\u2026",
  "description": "When delegating navigations to the operating system, Firefox would accept the \u0060mk\u0060 scheme which might allow attackers to launch pages and execute scripts in Internet Explorer in unprivileged mode. *This bug only affects Firefox for Windows. Other operating systems are unaffected.*. This vulnerability affects Firefox \u003C 92, Thunderbird \u003C 91.1, Thunderbird \u003C 78.14, Firefox ESR \u003C 78.14, and Firefox ESR \u003C 91.1.",
  "published": "2021-11-03T01:15:07Z",
  "severity": "",
  "cvss": 6.5,
  "epss": 0.01155,
  "epssPercentile": 0.67219,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://nvd.nist.gov/vuln/detail/CVE-2021-38492",
  "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": "91.1.2",
      "fix": "Mozilla Thunderbird (en-US) 91.1.2",
      "url": "https://patchblox.com/security/fix/windows-app/mozilla.thunderbird-91.1.2",
      "released": "2021-09-24T00:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T13:31:49Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}