CVE-2021-29959

MEDIUM

Firefox < 89.0 - Incorrect Authorization via Microphone and Camera Permissions

Title source: llm

Description

When a user has already allowed a website to access microphone and camera, disabling camera sharing would not fully prevent the website from re-enabling it without an additional prompt. This was only possible if the website kept recording with the microphone until re-enabling the camera. This vulnerability affects Firefox < 89.

References (3)

Core 3

Core References

Release Notes, Vendor Advisory x_refsource_misc

https://www.mozilla.org/security/advisories/mfsa2021-23/

Issue Tracking, Permissions Required, Vendor Advisory x_refsource_misc

https://bugzilla.mozilla.org/show_bug.cgi?id=1395819

Third Party Advisory vendor-advisory x_refsource_gentoo

https://security.gentoo.org/glsa/202107-09

Scores

CVSS v3 4.3

EPSS 0.0032

EPSS Percentile 54.8%

Attack Vector NETWORK

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

Details

CWE

CWE-863

Status published

Products (1)

mozilla/firefox 78.11.0 - 89.0

Published Jun 24, 2021

Tracked Since Feb 18, 2026