{
  "fix": "Firefox Developer Edition (en-US) 143.0",
  "url": "https://patchblox.com/security/fix/windows-app/mozilla.firefox.developeredition-143.0",
  "summary": "Firefox Developer Edition (en-US) 143.0, released September 5, 2025, fixes 10 CVEs in Firefox Developer Edition (en-US). None of them is reported as exploited. Patch Radar priority: High. The latest Firefox Developer Edition (en-US) is 156.0, which also fixes every one of these CVEs.",
  "platform": "windows-app",
  "type": "app-version",
  "title": "Firefox Developer Edition (en-US) 143.0",
  "released": "2025-09-05T00:00:00Z",
  "priority": "High",
  "priorityTier": 3,
  "priorityReason": "Closes CVE-2025-10533, high severity",
  "supported": true,
  "cveCount": 10,
  "exploitedCveCount": 0,
  "kevCveCount": 0,
  "ransomwareCveCount": 0,
  "maxEpss": 0.00781,
  "maxCvss": 8.8,
  "appliesTo": [
    {
      "product": "Firefox Developer Edition (en-US)",
      "productUrl": "https://patchblox.com/security/product/windows-app/firefox-developer-edition-en-us",
      "fixedVersion": "143.0",
      "latestVersion": "156.0",
      "supported": true
    }
  ],
  "supersededBy": {
    "product": "Firefox Developer Edition (en-US)",
    "latestVersion": "156.0",
    "productUrl": "https://patchblox.com/security/product/windows-app/firefox-developer-edition-en-us"
  },
  "cves": [
    {
      "cveId": "CVE-2025-10533",
      "url": "https://patchblox.com/security/cve/CVE-2025-10533",
      "title": "Integer overflow in the SVG component",
      "priority": "High",
      "severity": "Medium",
      "cvss": 8.8,
      "epss": 0.00781,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2025-10528",
      "url": "https://patchblox.com/security/cve/CVE-2025-10528",
      "title": "Sandbox escape due to undefined behavior, invalid pointer in the Graphics: Canvas2D component",
      "priority": "High",
      "severity": "Medium",
      "cvss": 7.5,
      "epss": 0.0037,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2025-10534",
      "url": "https://patchblox.com/security/cve/CVE-2025-10534",
      "title": "Spoofing issue in the Site Permissions component",
      "priority": "High",
      "cvss": 8.1,
      "epss": 0.00352,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2025-10537",
      "url": "https://patchblox.com/security/cve/CVE-2025-10537",
      "title": "Memory safety bugs fixed in Firefox ESR 140.3, Thunderbird ESR 140.3, Firefox 143 and Thunderbird 143",
      "priority": "High",
      "severity": "Important",
      "cvss": 8.8,
      "epss": 0.00339,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2025-10532",
      "url": "https://patchblox.com/security/cve/CVE-2025-10532",
      "title": "Incorrect boundary conditions in the JavaScript: GC component",
      "priority": "High",
      "severity": "Medium",
      "cvss": 7.5,
      "epss": 0.00328,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2025-10529",
      "url": "https://patchblox.com/security/cve/CVE-2025-10529",
      "title": "Same-origin policy bypass in the Layout component",
      "priority": "High",
      "severity": "Medium",
      "cvss": 7.5,
      "epss": 0.00317,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2025-10535",
      "url": "https://patchblox.com/security/cve/CVE-2025-10535",
      "title": "Information disclosure, mitigation bypass in the Privacy component in Firefox for Android",
      "priority": "High",
      "cvss": 7.5,
      "epss": 0.00312,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2025-10536",
      "url": "https://patchblox.com/security/cve/CVE-2025-10536",
      "title": "Information disclosure in the Networking: Cache component",
      "priority": "High",
      "severity": "Medium",
      "cvss": 7.5,
      "epss": 0.00175,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2025-10530",
      "url": "https://patchblox.com/security/cve/CVE-2025-10530",
      "title": "Spoofing issue in the WebAuthn component in Firefox for Android",
      "priority": "Routine",
      "cvss": 6.5,
      "epss": 0.00294,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2025-10531",
      "url": "https://patchblox.com/security/cve/CVE-2025-10531",
      "title": "Mitigation bypass in the Web Compatibility: Tooling component",
      "priority": "Routine",
      "cvss": 5.4,
      "epss": 0.00274,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    }
  ],
  "dataAsOf": "2026-11-08T13:06:02Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}