{
  "fix": "Mozilla Firefox (en-US) 117.0",
  "url": "https://patchblox.com/security/fix/windows-app/mozilla.firefox-117.0",
  "summary": "Mozilla Firefox (en-US) 117.0, released August 30, 2023, fixes 13 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) 117.0",
  "released": "2023-08-30T00:00:00Z",
  "priority": "High",
  "priorityTier": 3,
  "priorityReason": "Closes CVE-2023-4576, high severity",
  "supported": true,
  "cveCount": 13,
  "exploitedCveCount": 0,
  "kevCveCount": 0,
  "ransomwareCveCount": 0,
  "maxEpss": 0.01049,
  "maxCvss": 8.8,
  "appliesTo": [
    {
      "product": "Mozilla Firefox (en-US)",
      "productUrl": "https://patchblox.com/security/product/windows-app/mozilla-firefox-en-us",
      "fixedVersion": "117.0",
      "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-2023-4576",
      "url": "https://patchblox.com/security/cve/CVE-2023-4576",
      "title": "Integer Overflow in RecordedSourceSurfaceCreation",
      "priority": "High",
      "cvss": 8.6,
      "epss": 0.00821,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2023-4584",
      "url": "https://patchblox.com/security/cve/CVE-2023-4584",
      "title": "Memory safety bugs fixed in Firefox 117, Firefox ESR 102.15, Firefox ESR 115.2, Thunderbird 102.15, and Thunderbird 115.2",
      "priority": "High",
      "severity": "Important",
      "cvss": 8.8,
      "epss": 0.00804,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2023-4585",
      "url": "https://patchblox.com/security/cve/CVE-2023-4585",
      "title": "Memory safety bugs fixed in Firefox 117, Firefox ESR 115.2, and Thunderbird 115.2",
      "priority": "High",
      "severity": "Important",
      "cvss": 8.8,
      "epss": 0.00774,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2023-4583",
      "url": "https://patchblox.com/security/cve/CVE-2023-4583",
      "title": "Browsing Context potentially not cleared when closing Private Window",
      "priority": "High",
      "severity": "Important",
      "cvss": 8.8,
      "epss": 0.00685,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2023-4574",
      "url": "https://patchblox.com/security/cve/CVE-2023-4574",
      "title": "Memory corruption in IPC ColorPickerShownCallback",
      "priority": "High",
      "severity": "Important",
      "cvss": 8.8,
      "epss": 0.00663,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2023-4575",
      "url": "https://patchblox.com/security/cve/CVE-2023-4575",
      "title": "Memory corruption in IPC FilePickerShownCallback",
      "priority": "High",
      "severity": "Important",
      "cvss": 8.8,
      "epss": 0.00657,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2023-4577",
      "url": "https://patchblox.com/security/cve/CVE-2023-4577",
      "title": "Memory corruption in JIT UpdateRegExpStatics",
      "priority": "High",
      "severity": "Important",
      "cvss": 8.8,
      "epss": 0.00652,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2023-4573",
      "url": "https://patchblox.com/security/cve/CVE-2023-4573",
      "title": "Memory corruption in IPC CanvasTranslator",
      "priority": "High",
      "severity": "Important",
      "cvss": 8.8,
      "epss": 0.00632,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2023-4578",
      "url": "https://patchblox.com/security/cve/CVE-2023-4578",
      "title": "Error reporting methods in SpiderMonkey could have triggered an Out of Memory Exception",
      "priority": "High",
      "severity": "Important",
      "cvss": 8.8,
      "epss": 0.00622,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2023-4581",
      "url": "https://patchblox.com/security/cve/CVE-2023-4581",
      "title": "XLL file extensions were downloadable without warnings",
      "priority": "High",
      "severity": "Important",
      "cvss": 8.8,
      "epss": 0.00574,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2023-4580",
      "url": "https://patchblox.com/security/cve/CVE-2023-4580",
      "title": "Push notifications saved to disk unencrypted",
      "priority": "High",
      "severity": "Important",
      "cvss": 8.8,
      "epss": 0.00422,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2023-5732",
      "url": "https://patchblox.com/security/cve/CVE-2023-5732",
      "title": "Address bar spoofing via bidirectional characters",
      "priority": "Routine",
      "severity": "Important",
      "cvss": 6.5,
      "epss": 0.01049,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2023-4579",
      "url": "https://patchblox.com/security/cve/CVE-2023-4579",
      "title": "Persisted search terms were formatted as URLs",
      "priority": "Routine",
      "severity": "Medium",
      "cvss": 3.1,
      "epss": 0.00451,
      "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"
  }
}