{
  "fix": "Mozilla Firefox (en-US) 109.0",
  "url": "https://patchblox.com/security/fix/windows-app/mozilla.firefox-109.0",
  "summary": "Mozilla Firefox (en-US) 109.0, released January 17, 2023, fixes 9 CVEs in Mozilla Firefox (en-US). None of them is reported as exploited. Patch Radar priority: High. The latest Mozilla Firefox (en-US) is 159.0, which also fixes every one of these CVEs.",
  "platform": "windows-app",
  "type": "app-version",
  "title": "Mozilla Firefox (en-US) 109.0",
  "released": "2023-01-17T00:00:00Z",
  "priority": "High",
  "priorityTier": 3,
  "priorityReason": "Closes CVE-2023-23605, high severity",
  "supported": true,
  "cveCount": 9,
  "exploitedCveCount": 0,
  "kevCveCount": 0,
  "ransomwareCveCount": 0,
  "maxEpss": 0.00702,
  "maxCvss": 8.8,
  "appliesTo": [
    {
      "product": "Mozilla Firefox (en-US)",
      "productUrl": "https://patchblox.com/security/product/windows-app/mozilla-firefox-en-us",
      "fixedVersion": "109.0",
      "latestVersion": "159.0",
      "supported": true
    }
  ],
  "supersededBy": {
    "product": "Mozilla Firefox (en-US)",
    "latestVersion": "159.0",
    "productUrl": "https://patchblox.com/security/product/windows-app/mozilla-firefox-en-us"
  },
  "cves": [
    {
      "cveId": "CVE-2023-23605",
      "url": "https://patchblox.com/security/cve/CVE-2023-23605",
      "title": "Memory safety bugs fixed in Firefox 109 and Firefox ESR 102.7",
      "priority": "High",
      "severity": "Important",
      "cvss": 8.8,
      "epss": 0.00702,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2023-23598",
      "url": "https://patchblox.com/security/cve/CVE-2023-23598",
      "title": "Arbitrary file read from GTK drag and drop on Linux",
      "priority": "High",
      "severity": "Important",
      "cvss": 8.8,
      "epss": 0.00641,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2023-23603",
      "url": "https://patchblox.com/security/cve/CVE-2023-23603",
      "title": "Calls to console.log allowed bypassing Content Security Policy via format directive",
      "priority": "High",
      "severity": "Important",
      "cvss": 8.8,
      "epss": 0.00641,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2023-23599",
      "url": "https://patchblox.com/security/cve/CVE-2023-23599",
      "title": "Malicious command could be hidden in devtools output on Windows",
      "priority": "High",
      "severity": "Important",
      "cvss": 8.8,
      "epss": 0.00601,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2023-23602",
      "url": "https://patchblox.com/security/cve/CVE-2023-23602",
      "title": "Content Security Policy wasn\u0027t being correctly applied to WebSockets in WebWorkers",
      "priority": "High",
      "severity": "medium",
      "cvss": 8.8,
      "epss": 0.00601,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2023-23606",
      "url": "https://patchblox.com/security/cve/CVE-2023-23606",
      "title": "Memory safety bugs fixed in Firefox 109",
      "priority": "High",
      "severity": "Medium",
      "cvss": 8.8,
      "epss": 0.00521,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2023-23601",
      "url": "https://patchblox.com/security/cve/CVE-2023-23601",
      "title": "URL being dragged from cross-origin iframe into same tab triggers navigation",
      "priority": "High",
      "severity": "Important",
      "cvss": 8.8,
      "epss": 0.00347,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2023-23604",
      "url": "https://patchblox.com/security/cve/CVE-2023-23604",
      "title": "Creation of duplicate SystemPrincipal from less secure contexts",
      "priority": "Routine",
      "severity": "Medium",
      "cvss": 6.5,
      "epss": 0.00463,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2023-23597",
      "url": "https://patchblox.com/security/cve/CVE-2023-23597",
      "title": "Logic bug in process allocation allowed to read arbitrary files",
      "priority": "Routine",
      "severity": "Medium",
      "cvss": 6.5,
      "epss": 0.0034,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    }
  ],
  "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"
  }
}