CVE-2023-6206

MediumCVSS 5.4/10Last modified Jun 17, 2026

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.

Metrics

CVSS 3.1 5.4/10CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

Weakness enumeration

CWE-1021

Affected software

Vendor	Product	Versions
Mozilla	Firefox	>= unspecified, < 120
Mozilla	Firefox ESR	>= unspecified, < 115.5.0
Mozilla	Thunderbird	>= unspecified, < 115.5

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1857430Issue Tracking, Permissions Required
https://lists.debian.org/debian-lts-announce/2023/11/msg00017.htmlMailing List
https://lists.debian.org/debian-lts-announce/2023/11/msg00030.html
https://www.debian.org/security/2023/dsa-5561Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2023-49/Release Notes, Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2023-50/Release Notes, Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2023-52/Release Notes, Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1857430Issue Tracking, Permissions Required
https://lists.debian.org/debian-lts-announce/2023/11/msg00017.htmlMailing List
https://lists.debian.org/debian-lts-announce/2023/11/msg00030.html
https://www.debian.org/security/2023/dsa-5561Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2023-49/Release Notes, Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2023-50/Release Notes, Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2023-52/Release Notes, Vendor Advisory

Timeline

Published: Nov 21, 2023
Last modified: Jun 17, 2026
NVD status: Modified

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