CVE-2025-1019

Fullscreen notification not properly displayed

State: Published
Severity: 4.3 Medium
Published: Feb 4, 2025
Updated: Apr 13, 2026
Reserved: Feb 4, 2025

Description

The z-order of the browser windows could be manipulated to hide the fullscreen notification. This could potentially be leveraged to perform a spoofing attack. This vulnerability was fixed in Firefox 135 and Thunderbird 135.

Scores

CVSS	Score	Vector	Source
3.1	4.3 Medium	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N	CISA-ADP

Weaknesses

CWE-1021 Improper Restriction of Rendered UI Layers or Frames

Affected Products

Product	Versions
FirefoxMozilla	135 and laterNot affected
ThunderbirdMozilla	135 and laterNot affected

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1940162
https://www.mozilla.org/security/advisories/mfsa2025-07/
https://www.mozilla.org/security/advisories/mfsa2025-11/

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