{
  "fix": "RHSA-2025:8756",
  "url": "https://patchblox.com/security/fix/linux/rhsa-2025-8756",
  "summary": "RHSA-2025:8756, released June 10, 2025, fixes 13 CVEs in thunderbird (version 0:128.11.0-1.el8_10). None of them is reported as exploited. Patch Radar priority: High.",
  "platform": "linux",
  "type": "advisory",
  "title": "thunderbird security update",
  "released": "2025-06-10T00:00:00Z",
  "priority": "High",
  "priorityTier": 3,
  "priorityReason": "Closes CVE-2025-4918, high severity",
  "supported": true,
  "cveCount": 13,
  "exploitedCveCount": 0,
  "kevCveCount": 0,
  "ransomwareCveCount": 0,
  "maxEpss": 0.09515,
  "maxCvss": 9.8,
  "vendorAdvisory": "https://access.redhat.com/errata/RHSA-2025:8756",
  "appliesTo": [
    {
      "product": "thunderbird",
      "productUrl": "https://patchblox.com/security/product/linux/thunderbird",
      "release": "RHEL 8",
      "fixedVersion": "0:128.11.0-1.el8_10",
      "supported": true
    }
  ],
  "cves": [
    {
      "cveId": "CVE-2025-4918",
      "url": "https://patchblox.com/security/cve/CVE-2025-4918",
      "title": "Out-of-bounds access when resolving Promise objects",
      "priority": "High",
      "severity": "Medium",
      "cvss": 9.8,
      "epss": 0.09515,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2025-4919",
      "url": "https://patchblox.com/security/cve/CVE-2025-4919",
      "title": "Out-of-bounds access when optimizing linear sums",
      "priority": "High",
      "severity": "Important",
      "cvss": 8.8,
      "epss": 0.09115,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2025-5283",
      "url": "https://patchblox.com/security/cve/CVE-2025-5283",
      "title": "Chromium: CVE-2025-5283 Use after free in libvpx",
      "priority": "High",
      "severity": "Medium",
      "cvss": 8.8,
      "epss": 0.00642,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2025-5268",
      "url": "https://patchblox.com/security/cve/CVE-2025-5268",
      "title": "Memory safety bugs fixed in Firefox 139, Thunderbird 139, Firefox ESR 128.11, and Thunderbird 128.11",
      "priority": "High",
      "severity": "Important",
      "cvss": 8.8,
      "epss": 0.0051,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2025-5269",
      "url": "https://patchblox.com/security/cve/CVE-2025-5269",
      "title": "Memory safety bug fixed in Firefox ESR 128.11 and Thunderbird 128.11",
      "priority": "High",
      "severity": "Important",
      "cvss": 8.8,
      "epss": 0.00483,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2025-3909",
      "url": "https://patchblox.com/security/cve/CVE-2025-3909",
      "title": "JavaScript Execution via Spoofed PDF Attachment and file:/// Link",
      "priority": "High",
      "severity": "Important",
      "cvss": 8.8,
      "epss": 0.0047,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2025-3875",
      "url": "https://patchblox.com/security/cve/CVE-2025-3875",
      "title": "Sender Spoofing via Malformed From Header in Thunderbird",
      "priority": "High",
      "severity": "Important",
      "cvss": 8.8,
      "epss": 0.00396,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2025-3932",
      "url": "https://patchblox.com/security/cve/CVE-2025-3932",
      "title": "Tracking Links in Attachments Bypassed Remote Content Blocking",
      "priority": "High",
      "severity": "Important",
      "cvss": 8.8,
      "epss": 0.00388,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2025-5266",
      "url": "https://patchblox.com/security/cve/CVE-2025-5266",
      "title": "Script element events leaked cross-origin resource status",
      "priority": "High",
      "severity": "Important",
      "cvss": 8.8,
      "epss": 0.00341,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2025-5264",
      "url": "https://patchblox.com/security/cve/CVE-2025-5264",
      "title": "Potential local code execution in \u201CCopy as cURL\u201D command",
      "priority": "High",
      "severity": "Important",
      "cvss": 8.8,
      "epss": 0.00303,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2025-5267",
      "url": "https://patchblox.com/security/cve/CVE-2025-5267",
      "title": "Clickjacking vulnerability could have led to leaking saved payment card details",
      "priority": "High",
      "severity": "Important",
      "cvss": 8.8,
      "epss": 0.00281,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2025-5263",
      "url": "https://patchblox.com/security/cve/CVE-2025-5263",
      "title": "Error handling for script execution was incorrectly isolated from web content",
      "priority": "High",
      "severity": "Medium",
      "cvss": 8.8,
      "epss": 0.00265,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2025-3877",
      "url": "https://patchblox.com/security/cve/CVE-2025-3877",
      "title": "thunderbird: Rejected reason: This CVE was marked as fixed, but due to other code landing - was not actually fixed",
      "priority": "High",
      "severity": "Important",
      "cvss": 8.8,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    }
  ],
  "dataAsOf": "2026-11-07T18:46:35Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}