What is CVE-2020-6504?

CVE-2020-6504 is a medium-severity vulnerability in Google Chrome, classified under Incorrect Default Permissions. CVSS score: 4.3/10. Published 2020-06-03.

How severe is CVE-2020-6504?

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

Vulnerability in Google Chrome

CVE-2020-6504

Insufficient policy enforcement in notifications in Google Chrome prior to 74.0.3729.108 allowed a remote attacker to bypass notification restrictions via a crafted HTML page.

Published 2020-06-03 · last modified 2026-06-17.

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: 0.005 (43.6th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 44th percentile — 43.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

Google Chrome — versions unspecified

Weakness classification (CWE)

CWE-276 — Incorrect Default Permissions

References

chromereleases.googleblog.com/2019/04/stable-channel-update-for-desktop_23.html (Vendor Advisory)
crbug.com/875503 (Exploit, Issue Tracking, Vendor Advisory)

Frequently asked questions

What is CVE-2020-6504?: CVE-2020-6504 is a medium-severity vulnerability in Google Chrome, classified under Incorrect Default Permissions. CVSS score: 4.3/10. Published 2020-06-03.
How severe is CVE-2020-6504?: Medium severity. CVSS v3 base score is 4.3 out of 10.