CVE-2025-1018

Fullscreen notification is not displayed when fullscreen is re-requested

State: Published
Severity: 7.3 High
Published: Feb 4, 2025
Updated: Apr 13, 2026
Reserved: Feb 4, 2025

Description

The fullscreen notification is prematurely hidden when fullscreen is re-requested quickly by the user. This could have been leveraged to perform a potential spoofing attack. This vulnerability was fixed in Firefox 135 and Thunderbird 135.

Scores

CVSS	Score	Vector	Source
3.1	7.3 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L	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=1910818
https://www.mozilla.org/security/advisories/mfsa2025-07/
https://www.mozilla.org/security/advisories/mfsa2025-11/

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