{
  "fix": "libjavascriptcoregtk-4.0-18 2.30.3-0ubuntu0.18.04.1",
  "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libjavascriptcoregtk-4.0-18-2.30.3-0ubuntu0.18.04.1",
  "summary": "libjavascriptcoregtk-4.0-18 2.30.3-0ubuntu0.18.04.1, released September 8, 2021, fixes 12 CVEs in libjavascriptcoregtk-4.0-18. One of them is being exploited (CVE-2021-30661); 1 on CISA KEV. Patch Radar priority: Patch now. The product is no longer supported.",
  "platform": "linux",
  "type": "package",
  "title": "libjavascriptcoregtk-4.0-18 2.30.3-0ubuntu0.18.04.1 for Ubuntu 18.04.6 LTS (bionic)",
  "released": "2021-09-08T08:15:00Z",
  "priority": "Patch now",
  "priorityTier": 1,
  "priorityReason": "Closes CVE-2021-30661, exploited (CISA KEV)",
  "supported": false,
  "cveCount": 12,
  "exploitedCveCount": 1,
  "kevCveCount": 1,
  "ransomwareCveCount": 0,
  "maxEpss": 0.04938,
  "maxCvss": 8.8,
  "appliesTo": [
    {
      "product": "libjavascriptcoregtk-4.0-18",
      "productUrl": "https://patchblox.com/security/product/linux/libjavascriptcoregtk-4.0-18",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "2.30.3-0ubuntu0.18.04.1",
      "supported": true
    }
  ],
  "cves": [
    {
      "cveId": "CVE-2021-30661",
      "url": "https://patchblox.com/security/cve/CVE-2021-30661",
      "title": "gir1.2-javascriptcoregtk-4.0: A use after free issue was addressed with improved memory management",
      "priority": "Patch now",
      "severity": "Medium",
      "cvss": 8.8,
      "epss": 0.04491,
      "kev": true,
      "ransomware": false,
      "exploited": true,
      "disclosed": false
    },
    {
      "cveId": "CVE-2020-13584",
      "url": "https://patchblox.com/security/cve/CVE-2020-13584",
      "title": "accountsservice: ELSA-2021-1586: GNOME security, bug fix, and enhancement update (MODERATE)",
      "priority": "High",
      "severity": "MODERATE",
      "cvss": 8.8,
      "epss": 0.04938,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2020-13543",
      "url": "https://patchblox.com/security/cve/CVE-2020-13543",
      "title": "accountsservice: ELSA-2021-1586: GNOME security, bug fix, and enhancement update (MODERATE)",
      "priority": "High",
      "severity": "MODERATE",
      "cvss": 8.8,
      "epss": 0.03487,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2020-9951",
      "url": "https://patchblox.com/security/cve/CVE-2020-9951",
      "title": "iTunes: A use after free issue was addressed with improved memory management.",
      "priority": "High",
      "severity": "MODERATE",
      "cvss": 8.8,
      "epss": 0.02333,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2020-9983",
      "url": "https://patchblox.com/security/cve/CVE-2020-9983",
      "title": "accountsservice: ELSA-2021-1586: GNOME security, bug fix, and enhancement update (MODERATE)",
      "priority": "High",
      "severity": "MODERATE",
      "cvss": 8.8,
      "epss": 0.02201,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-1817",
      "url": "https://patchblox.com/security/cve/CVE-2021-1817",
      "title": "gir1.2-javascriptcoregtk-4.0: A memory corruption issue was addressed with improved state management",
      "priority": "High",
      "severity": "Medium",
      "cvss": 8.8,
      "epss": 0.01939,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2020-9947",
      "url": "https://patchblox.com/security/cve/CVE-2020-9947",
      "title": "iTunes: A use after free issue was addressed with improved memory management.",
      "priority": "High",
      "severity": "Medium",
      "cvss": 8.8,
      "epss": 0.01789,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2020-9948",
      "url": "https://patchblox.com/security/cve/CVE-2020-9948",
      "title": "accountsservice: ELSA-2021-1586: GNOME security, bug fix, and enhancement update (MODERATE)",
      "priority": "High",
      "severity": "MODERATE",
      "cvss": 8.8,
      "epss": 0.01694,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2020-9952",
      "url": "https://patchblox.com/security/cve/CVE-2020-9952",
      "title": "gir1.2-javascriptcoregtk-4.0: An input validation issue was addressed with improved input validation",
      "priority": "High",
      "severity": "Medium",
      "cvss": 7.1,
      "epss": 0.01497,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-1825",
      "url": "https://patchblox.com/security/cve/CVE-2021-1825",
      "title": "iTunes: An input validation issue was addressed with improved input validation.",
      "priority": "High",
      "severity": "Medium",
      "cvss": 8.1,
      "epss": 0.01364,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-1826",
      "url": "https://patchblox.com/security/cve/CVE-2021-1826",
      "title": "gir1.2-javascriptcoregtk-4.0: A logic issue was addressed with improved restrictions",
      "priority": "High",
      "severity": "Medium",
      "cvss": 8.1,
      "epss": 0.01144,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-1820",
      "url": "https://patchblox.com/security/cve/CVE-2021-1820",
      "title": "gir1.2-javascriptcoregtk-4.0: A memory initialization issue was addressed with improved memory handling",
      "priority": "Routine",
      "severity": "Medium",
      "cvss": 6.5,
      "epss": 0.01339,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    }
  ],
  "dataAsOf": "2026-11-12T07:53:35Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}