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CVE-2025-4083

NVD

https://nvd.nist.gov/vuln/detail/CVE-2025-4083

Severity

9.1

Critical

CVSS V3

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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 affects Firefox < 138, Firefox ESR < 128.10, Firefox ESR < 115.23, Thunderbird < 138, and Thunderbird < 128.10.

References

Affected packages

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