CVE-2020-6504Network attack vector

Notification restriction bypass via crafted HTML

Published Jun 3, 2020 · Updated Aug 4, 2024

Insufficient policy enforcement in Google Chrome before 74.0.3729.108 allows remote attackers to bypass notification restrictions via crafted HTML. Google identifies the notifications component, but the restricted Chromium issue leaves the faulty code locus and operation undisclosed. A user must open the attacker-controlled page; the documented consequence is limited to bypassing notification restrictions.

CVSS severity4.3
Medium
EPSS probability0.54%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Insufficient policy enforcement in Google Chrome before 74.0.3729.108 allows remote attackers to bypass notification restrictions via crafted HTML. Google identifies the notifications component, but the restricted Chromium issue leaves the faulty code locus and operation undisclosed. A user must open the attacker-controlled page; the documented consequence is limited to bypassing notification restrictions.

The record

CVE
CVE-2020-6504
Published
Jun 3, 2020
Updated
Aug 4, 2024
Vendor
Google Cloud
Product
Google Chrome
Classifications
CWE-276
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 3, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=unspecified <74.0.3729.108

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Google Cloud · Google Chromeversion=unspecified <74.0.3729.108

Published CVSS scores

4.3NVDAV:N/AC:M/Au:N/C:N/I:P/A:N
4.3NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-276Incorrect Default Permissions

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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