{
  "fix": "chromium-browser 91.0.4472.77-0ubuntu0.18.04.1",
  "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-chromium-browser-91.0.4472.77-0ubuntu0.18.04.1",
  "summary": "chromium-browser 91.0.4472.77-0ubuntu0.18.04.1, released January 2, 2023, fixes 36 CVEs in chromium-browser. One of them is being exploited (CVE-2021-30533); 1 on CISA KEV. Patch Radar priority: Patch now. The product is no longer supported.",
  "platform": "linux",
  "type": "package",
  "title": "chromium-browser 91.0.4472.77-0ubuntu0.18.04.1 for Ubuntu 18.04.6 LTS (bionic)",
  "released": "2023-01-02T15:15:00Z",
  "priority": "Patch now",
  "priorityTier": 1,
  "priorityReason": "Closes CVE-2021-30533, exploited (CISA KEV)",
  "supported": false,
  "cveCount": 36,
  "exploitedCveCount": 1,
  "kevCveCount": 1,
  "ransomwareCveCount": 0,
  "maxEpss": 0.16742,
  "maxCvss": 8.8,
  "appliesTo": [
    {
      "product": "chromium-browser",
      "productUrl": "https://patchblox.com/security/product/linux/chromium-browser",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "91.0.4472.77-0ubuntu0.18.04.1",
      "supported": true
    }
  ],
  "cves": [
    {
      "cveId": "CVE-2021-30533",
      "url": "https://patchblox.com/security/cve/CVE-2021-30533",
      "title": "Chromium: CVE-2021-30533 Insufficient policy enforcement in PopupBlocker",
      "priority": "Patch now",
      "severity": "Medium",
      "epss": 0.16742,
      "kev": true,
      "ransomware": false,
      "exploited": true,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-30558",
      "url": "https://patchblox.com/security/cve/CVE-2021-30558",
      "title": "chromium: chromium - security update",
      "priority": "High",
      "severity": "high",
      "cvss": 8.8,
      "epss": 0.11494,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-30538",
      "url": "https://patchblox.com/security/cve/CVE-2021-30538",
      "title": "Chromium: CVE-2021-30538 Insufficient policy enforcement in content security policy",
      "priority": "Routine",
      "severity": "Medium",
      "epss": 0.15728,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-30517",
      "url": "https://patchblox.com/security/cve/CVE-2021-30517",
      "title": "Chromium: CVE-2021-30517 Type Confusion in V8",
      "priority": "Routine",
      "severity": "Medium",
      "epss": 0.02517,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-30513",
      "url": "https://patchblox.com/security/cve/CVE-2021-30513",
      "title": "Chromium: CVE-2021-30513 Type Confusion in V8",
      "priority": "Routine",
      "severity": "Medium",
      "epss": 0.01962,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-30531",
      "url": "https://patchblox.com/security/cve/CVE-2021-30531",
      "title": "Chromium: CVE-2021-30531 Insufficient policy enforcement in Content Security Policy",
      "priority": "Routine",
      "severity": "Medium",
      "epss": 0.01741,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-30540",
      "url": "https://patchblox.com/security/cve/CVE-2021-30540",
      "title": "Chromium: CVE-2021-30540 Incorrect security UI in payments",
      "priority": "Routine",
      "severity": "Medium",
      "epss": 0.01438,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-30522",
      "url": "https://patchblox.com/security/cve/CVE-2021-30522",
      "title": "Chromium: CVE-2021-30522 Use after free in WebAudio",
      "priority": "Routine",
      "severity": "Medium",
      "epss": 0.0143,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-30528",
      "url": "https://patchblox.com/security/cve/CVE-2021-30528",
      "title": "Chromium: CVE-2021-30528 Use after free in WebAuthentication",
      "priority": "Routine",
      "severity": "Medium",
      "epss": 0.01346,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-30521",
      "url": "https://patchblox.com/security/cve/CVE-2021-30521",
      "title": "Chromium: CVE-2021-30521 Heap buffer overflow in Autofill",
      "priority": "Routine",
      "severity": "Medium",
      "epss": 0.01334,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-30516",
      "url": "https://patchblox.com/security/cve/CVE-2021-30516",
      "title": "Chromium: CVE-2021-30516 Heap buffer overflow in History",
      "priority": "Routine",
      "severity": "Medium",
      "epss": 0.01318,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-30518",
      "url": "https://patchblox.com/security/cve/CVE-2021-30518",
      "title": "Chromium: CVE-2021-30518 Heap buffer overflow in Reader Mode",
      "priority": "Routine",
      "severity": "Medium",
      "epss": 0.01318,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-30539",
      "url": "https://patchblox.com/security/cve/CVE-2021-30539",
      "title": "Chromium: CVE-2021-30539 Insufficient policy enforcement in content security policy",
      "priority": "Routine",
      "severity": "Medium",
      "epss": 0.01284,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-30534",
      "url": "https://patchblox.com/security/cve/CVE-2021-30534",
      "title": "Chromium: CVE-2021-30534 Insufficient policy enforcement in iFrameSandbox",
      "priority": "Routine",
      "severity": "Medium",
      "epss": 0.01216,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-30512",
      "url": "https://patchblox.com/security/cve/CVE-2021-30512",
      "title": "Chromium: CVE-2021-30512 Use after free in Notifications",
      "priority": "Routine",
      "severity": "Medium",
      "epss": 0.01211,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-30536",
      "url": "https://patchblox.com/security/cve/CVE-2021-30536",
      "title": "Chromium: CVE-2021-30536 Out of bounds read in V8",
      "priority": "Routine",
      "severity": "Medium",
      "epss": 0.01195,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-30510",
      "url": "https://patchblox.com/security/cve/CVE-2021-30510",
      "title": "Chromium: CVE-2021-30510 Race in Aura",
      "priority": "Routine",
      "severity": "Medium",
      "epss": 0.01193,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-30530",
      "url": "https://patchblox.com/security/cve/CVE-2021-30530",
      "title": "Chromium: CVE-2021-30530 Out of bounds memory access in WebAudio",
      "priority": "Routine",
      "severity": "Medium",
      "epss": 0.01181,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-30515",
      "url": "https://patchblox.com/security/cve/CVE-2021-30515",
      "title": "Chromium: CVE-2021-30515 Use after free in File API",
      "priority": "Routine",
      "severity": "Medium",
      "epss": 0.01179,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-30532",
      "url": "https://patchblox.com/security/cve/CVE-2021-30532",
      "title": "Chromium: CVE-2021-30532 Insufficient policy enforcement in Content Security Policy",
      "priority": "Routine",
      "severity": "Medium",
      "epss": 0.01167,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-30507",
      "url": "https://patchblox.com/security/cve/CVE-2021-30507",
      "title": "Chromium: CVE-2021-30507 Inappropriate implementation in Offline",
      "priority": "Routine",
      "severity": "Medium",
      "epss": 0.01144,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-30537",
      "url": "https://patchblox.com/security/cve/CVE-2021-30537",
      "title": "Chromium: CVE-2021-30537 Insufficient policy enforcement in cookies",
      "priority": "Routine",
      "severity": "Medium",
      "epss": 0.01143,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-30535",
      "url": "https://patchblox.com/security/cve/CVE-2021-30535",
      "title": "Chromium: CVE-2021-30535 Double free in ICU",
      "priority": "Routine",
      "severity": "Medium",
      "epss": 0.01128,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-30523",
      "url": "https://patchblox.com/security/cve/CVE-2021-30523",
      "title": "Chromium: CVE-2021-30523 Use after free in WebRTC",
      "priority": "Routine",
      "severity": "Medium",
      "epss": 0.01102,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-30514",
      "url": "https://patchblox.com/security/cve/CVE-2021-30514",
      "title": "Chromium: CVE-2021-30514 Use after free in Autofill",
      "priority": "Routine",
      "severity": "Medium",
      "epss": 0.01087,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-30529",
      "url": "https://patchblox.com/security/cve/CVE-2021-30529",
      "title": "Chromium: CVE-2021-30529 Use after free in Bookmarks",
      "priority": "Routine",
      "severity": "Medium",
      "epss": 0.01004,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-30526",
      "url": "https://patchblox.com/security/cve/CVE-2021-30526",
      "title": "Chromium: CVE-2021-30526 Out of bounds write in TabStrip",
      "priority": "Routine",
      "severity": "Medium",
      "epss": 0.00989,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-30524",
      "url": "https://patchblox.com/security/cve/CVE-2021-30524",
      "title": "Chromium: CVE-2021-30524 Use after free in TabStrip",
      "priority": "Routine",
      "severity": "Medium",
      "epss": 0.00962,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-30527",
      "url": "https://patchblox.com/security/cve/CVE-2021-30527",
      "title": "Chromium: CVE-2021-30527 Use after free in WebUI",
      "priority": "Routine",
      "severity": "Medium",
      "epss": 0.00962,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-30508",
      "url": "https://patchblox.com/security/cve/CVE-2021-30508",
      "title": "Chromium: CVE-2021-30508 Heap buffer overflow in Media Feeds",
      "priority": "Routine",
      "severity": "Medium",
      "epss": 0.00947,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-30519",
      "url": "https://patchblox.com/security/cve/CVE-2021-30519",
      "title": "Chromium: CVE-2021-30519 Use after free in Payments",
      "priority": "Routine",
      "severity": "Medium",
      "epss": 0.00899,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-30525",
      "url": "https://patchblox.com/security/cve/CVE-2021-30525",
      "title": "Chromium: CVE-2021-30525 Use after free in TabGroups",
      "priority": "Routine",
      "severity": "Medium",
      "epss": 0.00896,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-30511",
      "url": "https://patchblox.com/security/cve/CVE-2021-30511",
      "title": "Chromium: CVE-2021-30511 Out of bounds read in Tab Groups",
      "priority": "Routine",
      "severity": "Medium",
      "epss": 0.00875,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-30520",
      "url": "https://patchblox.com/security/cve/CVE-2021-30520",
      "title": "Chromium: CVE-2021-30520 Use after free in Tab Strip",
      "priority": "Routine",
      "severity": "Medium",
      "epss": 0.00865,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-30509",
      "url": "https://patchblox.com/security/cve/CVE-2021-30509",
      "title": "Chromium: CVE-2021-30509 Out of bounds write in Tab Strip",
      "priority": "Routine",
      "severity": "Medium",
      "epss": 0.00824,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-30506",
      "url": "https://patchblox.com/security/cve/CVE-2021-30506",
      "title": "Chromium: CVE-2021-30506 Incorrect security UI in Web App Installs",
      "priority": "Routine",
      "severity": "Medium",
      "epss": 0.00816,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    }
  ],
  "dataAsOf": "2026-11-12T19:57:06Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}