{
  "cveId": "CVE-2020-12423",
  "url": "https://patchblox.com/security/cve/CVE-2020-12423",
  "summary": "CVE-2020-12423 is fixed in Mozilla Firefox ESR (en-US) on 1 platform by Mozilla Firefox ESR (en-US) 78.0esr (version 78.0esr), released June 25, 2020. It is not reported as exploited. Patch Radar priority: High.",
  "title": "Firefox ESR: When the Windows DLL \u0022webauthn.dll\u0022 was missing from the Operating System, and a malicious one was placed\u2026",
  "description": "When the Windows DLL \u0022webauthn.dll\u0022 was missing from the Operating System, and a malicious one was placed in a folder in the user\u0027s %PATH%, Firefox may have loaded the DLL, leading to arbitrary code execution. *Note: This issue only affects the Windows operating system; other operating systems are unaffected.* This vulnerability affects Firefox \u003C 78.",
  "published": "2020-07-09T15:15:12Z",
  "severity": "",
  "cvss": 7.8,
  "epss": 0.00414,
  "epssPercentile": 0.36002,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://nvd.nist.gov/vuln/detail/CVE-2020-12423",
  "fixes": [
    {
      "platform": "windows-app",
      "product": "Mozilla Firefox ESR (en-US)",
      "fixedVersion": "78.0esr",
      "fix": "Mozilla Firefox ESR (en-US) 78.0esr",
      "url": "https://patchblox.com/security/fix/windows-app/mozilla.firefox.esr-78.0esr",
      "released": "2020-06-25T00:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T00:53:09Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}