CVE-2025-4085

firefox: thunderbird: Potential information leakage and privilege escalation in UITour actor

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Severity

Moderate

Red Hat Product Security

6.8

CVSS 3.1

Review impact separately from score.

Published · April 29, 2025

Updated · June 28, 2026

Description

A flaw was found in Firefox. The Mozilla Foundation's Security Advisory describes the following issue: An attacker with control over a content process could potentially leverage the privileged UITour actor to leak sensitive information or escalate privileges.

Statement

Red Hat Product Security rates the severity of this flaw as determined by the Mozilla Foundation Security Advisory.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 6.8
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:L

CWE-200 · Exposure of Sensitive Information to an Unauthorized Actor