CVE-2023-6206

Mozilla: Clickjacking permission prompts using the fullscreen transition

Published Nov 21, 2023 CVSS 3.1 · 5.4 Medium EPSS < 1% KEV · Not listed
Description
The black fade animation when exiting fullscreen is roughly the length of the anti-clickjacking delay on permission prompts. It was possible to use this fact to surprise users by luring them to click where the permission grant button would be about to appear. This vulnerability affects Firefox < 120, Firefox ESR < 115.5.0, and Thunderbird < 115.5.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Debian DLA Debian DLA DLA-3661-1 firefox-esr security update
Debian DLA Debian DLA DLA-3674-1 thunderbird security update
Debian DSA Debian DSA DSA-5561-1 firefox-esr security update
Debian DSA Debian DSA DSA-5566-1 thunderbird security update
EUVD EUVD EUVD-2023-58453 The black fade animation when exiting fullscreen is roughly the length of the anti-clickjacking delay on permission prompts. It was possible to use this fact to surprise users by luring them to click where the permission grant button would be about to appear. This vulnerability affects Firefox < 120, Firefox ESR < 115.5.0, and Thunderbird < 115.5.
Ubuntu USN Ubuntu USN USN-6509-1 Firefox vulnerabilities
Ubuntu USN Ubuntu USN USN-6515-1 Thunderbird vulnerabilities
History

No history.

Weaknesses

Sources

Status
PUBLISHED
Assigner
mozilla
Published
Updated
Feb 13, 2025, 5:26 PM
Reserved
Nov 20, 2023, 1:33 PM
Status
Modified
Published
Nov 21, 2023, 3:15 PM
Modified
Jun 17, 2026, 6:50 AM
Severity
Important
Public date
Nov 21, 2023, 12:00 AM