What is CVE-2021-23963?

CVE-2021-23963 is a medium-severity vulnerability in Mozilla Firefox, classified under Improper Preservation of Permissions. CVSS score: 4.3/10. Published 2021-02-26.

How severe is CVE-2021-23963?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Vulnerability in Mozilla Firefox

CVE-2021-23963

When sharing geolocation during an active WebRTC share, Firefox could have reset the webRTC sharing state in the user interface, leading to loss of control over the currently granted permission. This vulnerability affects Firefox < 85.

EPSS: 0.007 (47.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N.

Affected products

Mozilla Firefox — versions < 85

Weakness classification (CWE)

CWE-281 — Improper Preservation of Permissions

References

security@mozilla.org (x_refsource_MISC, Release Notes, Vendor Advisory)
security@mozilla.org (Permissions Required, x_refsource_MISC, Issue Tracking, Vendor Advisory)

Frequently asked questions

What is CVE-2021-23963?: CVE-2021-23963 is a medium-severity vulnerability in Mozilla Firefox, classified under Improper Preservation of Permissions. CVSS score: 4.3/10. Published 2021-02-26.
How severe is CVE-2021-23963?: Medium severity. CVSS v3 base score is 4.3 out of 10.