What is CVE-2021-4321?

CVE-2021-4321 is a medium-severity vulnerability in Google Chrome. CVSS score: 4.3/10. Published 2023-07-29.

How severe is CVE-2021-4321?

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

Vulnerability in Google Chrome

CVE-2021-4321

Policy bypass in Blink in Google Chrome prior to 91.0.4472.77 allowed a remote attacker to bypass content security policy via a crafted HTML page. (Chromium security severity: Low)

EPSS: 0.004 (36.2th 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

Google Chrome — versions 91.0.4472.77

References

chrome-cve-admin@google.com (Release Notes, Vendor Advisory)
chrome-cve-admin@google.com (Exploit, Issue Tracking, Vendor Advisory)
chrome-cve-admin@google.com

Frequently asked questions

What is CVE-2021-4321?: CVE-2021-4321 is a medium-severity vulnerability in Google Chrome. CVSS score: 4.3/10. Published 2023-07-29.
How severe is CVE-2021-4321?: Medium severity. CVSS v3 base score is 4.3 out of 10.