CVE-2020-15973: Google Chrome vulnerability

CVE-2020-15973: Insufficient policy enforcement in extensions in Google Chrome prior to 86.0.4240.75 allowed an attacker wh...

Insufficient policy enforcement in extensions in Google Chrome prior to 86.0.4240.75 allowed an attacker who convinced a user to install a malicious extension to bypass same origin policy via a crafted Chrome Extension.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 4, 2024, 13:30 UTC (UTC+00:00)

Security readout for executives and security teams

CVE-2020-15973 affected Google Chrome before 86.0.4240.75. If a user installed a malicious Chrome extension, the extension could bypass same origin policy protections, potentially weakening browser isolation around website data. Exposure is most likely on endpoints running Google Chrome or Chromium-derived distro packages older than the vendor-fixed releases, especially where users can install untrusted extensions. Treat this as a browser hygiene and extension governance issue. It is not cited as actively exploited, but malicious extensions can create meaningful data exposure, so prioritize patch verification and extension controls. Mitigation focus: Update Google Chrome to 86.0.4240.75 or later.; Apply relevant Chromium package updates from Linux distribution advisories.; Restrict extension installation to approved publishers and extension IDs..

Prepared: Jun 5, 2026, 13:51 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Nov 3, 2020, 02:21 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

0Timeline events

0ADP providers

7Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

CVE List V5 sourceCVE List V5
https://chromereleases.googleblog.com/2020/10/stable-channel-update-for-desktop.htmlCVE reference · x_refsource_MISC
https://crbug.com/1106890CVE reference · x_refsource_MISC
FEDORA-2020-127d40f1abCVE reference · vendor-advisory, x_refsource_FEDORA
FEDORA-2020-8aca25b5c8CVE reference · vendor-advisory, x_refsource_FEDORA
FEDORA-2020-4e8e48da22CVE reference · vendor-advisory, x_refsource_FEDORA
DSA-4824CVE reference · vendor-advisory, x_refsource_DEBIAN

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

GoogleChromeunspecifiedListed

Weakness

CWE details

No CWE listed

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