CVE-2025-1019

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.

CVSS v3 4.3 MEDIUM

4.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://bugzilla.mozilla.org/show_bug.cgi?id=1940162	Permissions Required
https://www.mozilla.org/security/advisories/mfsa2025-07/	Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-11/	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:mozilla:firefox:::::-:::*
	cpe:2.3:a:mozilla:thunderbird:::::-:::*

History

05 Oct 2026, 15:10

Type	Values Removed	Values Added
Summary	(es) El orden z de las ventanas del navegador podría manipularse para ocultar la notificación de pantalla completa. Esto podría aprovecharse para realizar un ataque de suplantación de identidad. Esta vulnerabilidad afecta a Firefox < 135 y Thunderbird < 135.	(es) El orden z de las ventanas del navegador podría manipularse para ocultar la notificación de pantalla completa. Esto podría aprovecharse para realizar un ataque de suplantación de identidad. Esta vulnerabilidad afecta a Firefox menor que 135 y Thunderbird menor que 135.

30 Sep 2026, 19:10

Type	Values Removed	Values Added
Summary	(es) El orden z de las ventanas del navegador podría manipularse para ocultar la notificación de pantalla completa. Esto podría aprovecharse para realizar un ataque de suplantación de identidad. Esta vulnerabilidad afecta a Firefox < 135 y Thunderbird < 135.	(es) El orden z de las ventanas del navegador podría manipularse para ocultar la notificación de pantalla completa. Esto podría aprovecharse para realizar un ataque de suplantación de identidad. Esta vulnerabilidad afecta a Firefox < 135 y Thunderbird < 135.

Information

Published : 2025-02-04 14:15

Updated : 2026-10-05 15:10

NVD link : CVE-2025-1019

Mitre link : CVE-2025-1019

CVE.ORG link : CVE-2025-1019

JSON object : View

Products Affected

mozilla

firefox
thunderbird

CWE

CWE-1021

Improper Restriction of Rendered UI Layers or Frames

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