CVE-2023-4053

Full screen notification obscured by external program

Published Aug 1, 2023 CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed
Description
A website could have obscured the full screen notification by using a URL with a scheme handled by an external program, such as a mailto URL. This could have led to user confusion and possible spoofing attacks. This vulnerability affects Firefox < 116, Firefox ESR < 115.2, and Thunderbird < 115.2.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2023-53944 A website could have obscured the full screen notification by using a URL with a scheme handled by an external program, such as a mailto URL. This could have led to user confusion and possible spoofing attacks. This vulnerability affects Firefox < 116, Firefox ESR < 115.2, and Thunderbird < 115.2.
Ubuntu USN Ubuntu USN USN-6267-1 Firefox vulnerabilities
History
Type Values Removed Values Added
Title Mozilla: Full screen notification obscured by external program Full screen notification obscured by external program
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
mozilla
Published
Updated
Dec 18, 2025, 3:23 PM
Reserved
Aug 1, 2023, 2:59 PM
Status
Modified
Published
Aug 1, 2023, 3:15 PM
Modified
Jun 17, 2026, 6:36 AM
Severity
Moderate
Public date
Aug 29, 2023, 12:00 AM