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CVE Record

CVE-2021-30537: Insufficient policy enforcement in cookies in Google Chrome prior to 91.0.4472.77 allowed a remote attacker...

Insufficient policy enforcement in cookies in Google Chrome prior to 91.0.4472.77 allowed a remote attacker to bypass cookie policy via a crafted HTML page.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

This vulnerability affected Google Chrome before 91.0.4472.77. A malicious web page could bypass Chrome cookie policy controls, potentially weakening browser privacy or session-boundary protections. The provided sources do not assign CVSS severity or describe confirmed real-world exploitation.

Executive priority

Treat this as a routine browser security remediation unless legacy Chrome versions remain in use. The business priority is ensuring browser patch compliance, especially on unmanaged or lightly managed endpoints.

Technical view

CVE-2021-30537 is an insufficient policy enforcement issue in Chrome cookie handling. The stated attack vector is remote delivery of a crafted HTML page. Google addressed it in the Chrome stable desktop update to 91.0.4472.77. The source bundle does not provide CWE, CVSS, exploit mechanics, or detailed impact scope.

Likely exposure

Exposure is mainly endpoints running Google Chrome versions earlier than 91.0.4472.77. Organizations with unmanaged browsers, delayed desktop patching, or distro-packaged browser updates may have had higher residual exposure.

Exploitation context

The bundle says exploitation required a crafted HTML page. CISA KEV status is false, and the provided sources do not report active exploitation. No exploit code or weaponized technique is described in the supplied evidence.

Researcher notes

Evidence is limited to the CVE description and vendor/distro references. The Chromium bug link is listed, but the bundle does not provide technical detail. Avoid assuming cookie types, sandbox impact, or session theft without additional vendor-confirmed data.

Mitigation direction

  • Update Google Chrome to 91.0.4472.77 or later.
  • Apply relevant Gentoo or Fedora browser package advisories if those platforms are used.
  • Verify enterprise browser update policies enforce patched versions.
  • Retire unsupported Chrome builds that cannot receive security updates.
  • Check current vendor guidance for any newer cumulative browser updates.

Validation and detection

  • Inventory Chrome versions across managed endpoints.
  • Confirm no endpoints report Chrome versions earlier than 91.0.4472.77.
  • Review package update status on Gentoo and Fedora systems.
  • Confirm browser auto-update controls are enabled and functioning.
  • Document any exceptions with compensating controls and remediation dates.
Prepared
Confidence
medium
Sources
7

Public sources used

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

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

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CVE-2021-30537 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
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
6Source links

CVSS and timeline data

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

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
GoogleChromeunspecifiedListed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.