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Fencer Vulns
medium 4.3

CVE-2020-6504 json

Insufficient policy enforcement in notifications in Google Chrome prior to 74.0.3729.108 allowed a remote attacker to bypass notification r…

published 2020-06-03 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-27654

cvss
4.3
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 46%
public exploits
0
none known

Summary

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.

Patch / fix

  • Google Chrome 74.0.3729.108
  • chromium Debian 14, Debian 13, Debian 12 74.0.3729.108-1

debian advisories DEBIAN-CVE-2020-6504

  • chromium-browser Ubuntu 16.04 LTS 74.0.3729.169-0ubuntu0.16.04.1
  • chromium-browser Ubuntu 18.04 LTS 74.0.3729.169-0ubuntu0.18.04.1

ubuntu advisories UBUNTU-CVE-2020-6504

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • chromium-browser RHEL 6 EXTRAS 74.0.3729.108-1.el6_10

red hat advisories RHSA-2019:1021

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2020-6504 updated cvss 4.3

chromium-browser: Insufficient policy enforcement in notifications

  • Red Hat Enterprise Linux Desktop Supplementary (v. 6) chromium-browser 74.0.3729.108-1.el6_10 Red Hat Enterprise Linux HPC Node Supplementary (v. 6) chromium-browser 74.0.3729.108-1.el6_10 Red Hat Enterprise Linux Server Supplementary (v. 6) chromium-browser 74.0.3729.108-1.el6_10 Red Hat Enterprise Linux Workstation Supplementary (v. 6) chromium-browser 74.0.3729.108-1.el6_10
    fixed: vendor fix RHSA-2019:1021

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.56% chance of exploitation in the next 30 days, higher than 46% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • crbug.com https://crbug.com/875503 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 4.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:P/A:N

Affected products

  • Google Chrome

Classification

Weakness
  • CWE-276 Incorrect Default Permissions
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.