CVE-2025-4083

CriticalCVSS 9.1/10Last modified Oct 5, 2026

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.

Metrics

CVSS 3.1 9.1/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Weakness enumeration

CWE-653

Affected software

No affected versions have been published.

Timeline

Published: Apr 29, 2025
Last modified: Oct 5, 2026
NVD status: Modified

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