CVE advisoryCRITICAL
CVE-2025-4083
Thunderbird Process Isolation Vulnerability Allows Sandbox Escape
Halo Surface Signal: 1 out of 5 — much less likely to be public-facing.
A process isolation flaw in certain Mozilla products allows malicious content to bypass intended security boundaries, potentially leading to elevated privileges and unauthorized access. This vulnerability is triggered by improperly handled javascript: URIs, which could enable content to execute outside its designated f