CVE-2023-1221Network attack vector

Navigation restriction bypass via malicious extension

Published Mar 7, 2023 · Updated Oct 15, 2024

Insufficient policy enforcement in Google Chrome before 111.0.5563.64 allows attackers to bypass navigation restrictions via a malicious extension. The Extensions API treats broad URL permission as sufficient for local-file navigation even when the extension's file-access setting is disabled. Exploitation requires a user to install the crafted extension; published records identify navigation-policy bypass but no further impact.

CVSS severity4.3
Medium
EPSS probability0.33%
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 111.0.5563.64 allows attackers to bypass navigation restrictions via a malicious extension. The Extensions API treats broad URL permission as sufficient for local-file navigation even when the extension's file-access setting is disabled. Exploitation requires a user to install the crafted extension; published records identify navigation-policy bypass but no further impact.

The record

CVE
CVE-2023-1221
Published
Mar 7, 2023
Updated
Oct 15, 2024
Vendor
Google Cloud
Product
Google Chrome
Classifications
T1176
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 7, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 15, 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=111.0.5563.64 <111.0.5563.64

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Google Cloud · Google Chromeversion=111.0.5563.64 <111.0.5563.64

Published CVSS scores

4.3NIST NVDCVSS: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

T1176Browser Extensions

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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