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.
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.007 (49.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 50th percentile — 49.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000
Affected products
- Mozilla Firefox — versions < 85
Weakness classification (CWE)
References
- www.mozilla.org/security/advisories/mfsa2021-03/ (Release Notes, Vendor Advisory)
- bugzilla.mozilla.org/show_bug.cgi (Permissions Required, 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.