Spoofing Vulnerability in Firefox and Thunderbird
CVE-2025-1019

4.3MEDIUM

Key Information:

Vendor

Mozilla
Status
Firefox
Thunderbird
Vendor
CVE Published:
4 February 2025

What is CVE-2025-1019?

A vulnerability allows for the manipulation of the z-order of browser windows, which can conceal fullscreen notifications. This condition may enable attackers to exploit the flaw by conducting spoofing attacks, potentially deceiving users into believing they are interacting with legitimate interfaces. Affected versions include Firefox and Thunderbird prior to version 135.

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Affected Version(s)

Firefox < 135

Thunderbird < 135

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/

CVSS V3.1

Score:
4.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Irvan Kurniawan
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