CVE-2025-4083
CRITICALDescription
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.
How to fix
TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works
Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.
CVSS v3 Vector
Exploitability
Impact
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Exploit Intelligence
Low risk: more likely to be exploited than 32% of all known CVEs.
References
Related Vulnerabilities
Other CWE-653 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2025-1974 | Critical | 9.8 | 99% | - | - |
| CVE-2025-57738 | High | 7.2 | 23% | - | Fix |
| CVE-2025-21590 | Medium | 4.4 | 1.7% | KEV | - |
| CVE-2026-24781 | Critical | 9.8 | 1.2% | - | Fix |
| CVE-2024-0135 | High | 7.6 | 1.1% | - | Fix |
| CVE-2026-43997 | Critical | 10.0 | 1.0% | - | Fix |
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Markdown
[](https://tridentstack.com/cve/CVE-2025-4083)HTML
<a href="https://tridentstack.com/cve/CVE-2025-4083"><img src="https://tridentstack.com/cve/badge/CVE-2025-4083.svg" alt="CVE-2025-4083"></a>Find and fix vulnerabilities across your fleet
TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.
This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-13.