🛡️ CVE-2025-5267 — firefox

🟡 CVSS 5.4 — Medium ✅ No Known Exploit CWE-1021 NVD
5.4
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

A clickjacking vulnerability could have been used to trick a user into leaking saved payment card details to a malicious page. This vulnerability was fixed in Firefox 139, Firefox ESR 128.11, Thunderbird 139, and Thunderbird 128.11.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. A user must be tricked into taking some action. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality low, integrity low, availability none.

Weakness class

CVE-2025-5267 is classified as CWE-1021: Improper Restriction of Rendered UI Layers. The interface can be framed or overlaid by another site, so clicks can be redirected without the user noticing.

Affected software

CVE-2025-5267 is recorded against 1 package.

  • firefox (fixed in 139.0)

Timeline and source

Published on 27 May 2025 and last revised on 17 June 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

bugzilla.mozilla.org
www.mozilla.org
www.mozilla.org
www.mozilla.org
www.mozilla.org
lists.debian.org
lists.debian.org

CVE-2025-5267 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity MEDIUM
CVSS Score 5.4
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
CWE CWE-1021
Public Exploit ✅ No
Source NVD
Published 2025-05-27
Updated 2026-08-11
Modified 2026-06-17
Fix URL N/A

Affected Packages

Software From version Fixed in
firefox — 139.0

Similar Threats

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