CVE-2021-38506

medium

Description

Through a series of navigations, Firefox could have entered fullscreen mode without notification or warning to the user. This could lead to spoofing attacks on the browser UI including phishing. This vulnerability affects Firefox < 94, Thunderbird < 91.3, and Firefox ESR < 91.3.

References

Advisories
More

https://www.debian.org/security/2022/dsa-5034

https://www.debian.org/security/2021/dsa-5026

https://security.gentoo.org/glsa/202208-14

https://security.gentoo.org/glsa/202202-03

https://lists.debian.org/debian-lts-announce/2022/01/msg00001.html

https://lists.debian.org/debian-lts-announce/2021/12/msg00030.html

https://www.mozilla.org/security/advisories/mfsa2021-50/

https://www.mozilla.org/security/advisories/mfsa2021-49/

https://www.mozilla.org/security/advisories/mfsa2021-48/

https://bugzilla.mozilla.org/show_bug.cgi?id=1730750

Details

Source: Mitre, NVD

Published: 2021-12-08

Updated: 2022-12-09

Risk Information

CVSS v2

Base Score: 4.3

Vector: CVSS2#AV:N/AC:M/Au:N/C:N/I:P/A:N

Severity: Medium

CVSS v3

Base Score: 4.3

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

Severity: Medium

EPSS

EPSS: 0.00207