What is CVE-2020-6810?

CVE-2020-6810 is a medium-severity vulnerability in Mozilla Firefox, classified under Authentication Bypass by Spoofing. CVSS score: 4.3/10. Published 2020-03-25.

How severe is CVE-2020-6810?

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

Is CVE-2020-6810 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Mozilla Firefox

CVE-2020-6810

After a website had entered fullscreen mode, it could have used a previously opened popup to obscure the notification that indicates the browser is in fullscreen mode. Combined with spoofing the browser chrome, this could have led to confusing the user about the current origin of the page and credential theft or other attacks. This vulnerability affects Firefox < 74.

EPSS: 0.010 (58.4th 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 unspecified

Weakness classification (CWE)

CWE-290 — Authentication Bypass by Spoofing

Public proof-of-concept exploits

ARPSyndicate/cve-scores

References

security@mozilla.org (x_refsource_MISC, Vendor Advisory)
security@mozilla.org (x_refsource_MISC, Issue Tracking, Vendor Advisory)

Frequently asked questions

What is CVE-2020-6810?: CVE-2020-6810 is a medium-severity vulnerability in Mozilla Firefox, classified under Authentication Bypass by Spoofing. CVSS score: 4.3/10. Published 2020-03-25.
How severe is CVE-2020-6810?: Medium severity. CVSS v3 base score is 4.3 out of 10.
Is CVE-2020-6810 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.