CVE-2025-4083

CRITICAL EPSS 28.3%
Published Apr 29, 20251y ago · Modified Jun 17, 20262w ago
9.1 CVSS 3.1
Critical
Find Similar
Published Apr 29, 2025 1y ago
Last Modified Jun 17, 2026 2w ago

Description

A process isolation vulnerability in Thunderbird stemmed from improper handling of javascript: URIs, which could allow content to execute in the top-level document's process instead of the intended frame, potentially enabling a sandbox escape. This vulnerability was fixed in Firefox 138, Firefox ESR 128.10, Firefox ESR 115.23, Thunderbird 138, and Thunderbird 128.10.

CVSS Details

Base Score
9.1
Exploitability
3.9
Impact
5.2
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability None

Threat Intelligence

EPSS Exploit Probability
28.3% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-653

Affected Products 5

VendorProductVersionRange
mozillafirefox* <115.23
mozillafirefox* <138.0
mozillafirefox*≥128.0  –  <128.10
mozillathunderbird* <128.10.0
mozillathunderbird* <138.0

References 7

  • bugzilla.mozilla.org https://bugzilla.mozilla.org/show_bug.cgi?id=1958350
    Permissions Required
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/05/msg00024.html
  • mozilla.org https://www.mozilla.org/security/advisories/mfsa2025-28/
    Vendor Advisory
  • mozilla.org https://www.mozilla.org/security/advisories/mfsa2025-29/
    Vendor Advisory
  • mozilla.org https://www.mozilla.org/security/advisories/mfsa2025-30/
    Vendor Advisory
  • mozilla.org https://www.mozilla.org/security/advisories/mfsa2025-31/
    Vendor Advisory
  • mozilla.org https://www.mozilla.org/security/advisories/mfsa2025-32/
    Vendor Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.