What is CVE-2023-5729?

CVE-2023-5729 is a medium-severity vulnerability in Mozilla Firefox. CVSS score: 4.3/10. Published 2023-10-25.

How severe is CVE-2023-5729?

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

Vulnerability in Mozilla Firefox

CVE-2023-5729

A malicious web site can enter fullscreen mode while simultaneously triggering a WebAuthn prompt. This could have obscured the fullscreen notification and could have been leveraged in a spoofing attack. This vulnerability affects Firefox < 119.

EPSS: 0.006 (44.5th 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

References

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

Frequently asked questions

What is CVE-2023-5729?: CVE-2023-5729 is a medium-severity vulnerability in Mozilla Firefox. CVSS score: 4.3/10. Published 2023-10-25.
How severe is CVE-2023-5729?: Medium severity. CVSS v3 base score is 4.3 out of 10.