CVE-2025-4086

firefox: thunderbird: Specially crafted filename could be used to obscure download type

Loading…

Severity

Moderate

Red Hat Product Security

5.4

CVSS 3.1

Review impact separately from score.

Published · April 29, 2025

Updated · November 21, 2025

Description

A flaw was found in Firefox. The Mozilla Foundation's Security Advisory describes the following issue: A specially crafted filename containing a large number of encoded newline characters could obscure the file's extension when displayed in the download dialog. This bug only affects Firefox for Android. Other versions of Firefox are unaffected.

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 · 5.4
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

CWE-451 · User Interface (UI) Misrepresentation of Critical Information