vulnerability

MFSA2025-28 Firefox: Security Vulnerabilities fixed in Firefox 138 (CVE-2025-4085)

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Severity

CVSS

(AV:N/AC:L/Au:S/C:C/I:P/A:N)

Published

Apr 29, 2025

Added

Apr 30, 2025

Modified

Apr 15, 2026

Description

An attacker with control over a content process could potentially leverage the privileged UITour actor to leak sensitive information or escalate privileges. This vulnerability was fixed in Firefox 138 and Thunderbird 138.

Solution

mozilla-firefox-upgrade-138_0

References

CVE-2025-4085
https://attackerkb.com/topics/CVE-2025-4085
CWE-269
EUVD-EUVD-2025-12686
http://www.mozilla.org/security/announce/2025/mfsa2025-28.html
https://euvd.enisa.europa.eu/vulnerability/EUVD-2025-12686

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