Vulnerability Monitor

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CVE-2025-4083

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.

Published

2025-04-29T14:15:35.003

Last Modified

2025-11-03T20:19:10.103

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 9.1 (CRITICAL)

Weaknesses

Type: Secondary
CWE-653

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	mozilla	firefox	< 115.23	Yes
Application	mozilla	firefox	< 138.0	Yes
Application	mozilla	firefox	< 128.10	Yes
Application	mozilla	thunderbird	< 128.10.0	Yes
Application	mozilla	thunderbird	< 138.0	Yes

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1958350 Permissions Required ([email protected])
https://www.mozilla.org/security/advisories/mfsa2025-28/ Vendor Advisory ([email protected])
https://www.mozilla.org/security/advisories/mfsa2025-29/ Vendor Advisory ([email protected])
https://www.mozilla.org/security/advisories/mfsa2025-30/ Vendor Advisory ([email protected])
https://www.mozilla.org/security/advisories/mfsa2025-31/ Vendor Advisory ([email protected])
https://www.mozilla.org/security/advisories/mfsa2025-32/ Vendor Advisory ([email protected])
https://lists.debian.org/debian-lts-announce/2025/05/msg00024.html (af854a3a-2127-422b-91ae-364da2661108)