CVE-2023-5475Network attack vector

Extension permission boundary bypass

Published Oct 11, 2023 · Updated Feb 13, 2025

Access-control bypass in DevTools in Google Chrome before 118.0.5993.70 allows attackers to exceed extension permissions. The public Chrome record identifies only an inappropriate DevTools implementation and does not disclose the responsible function or incorrect operation. Exploitation requires a user to install a crafted malicious extension, after which the extension can bypass its discretionary access-control boundary.

CVSS severity6.5
Medium
EPSS probability0.59%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Access-control bypass in DevTools in Google Chrome before 118.0.5993.70 allows attackers to exceed extension permissions. The public Chrome record identifies only an inappropriate DevTools implementation and does not disclose the responsible function or incorrect operation. Exploitation requires a user to install a crafted malicious extension, after which the extension can bypass its discretionary access-control boundary.

The record

CVE
CVE-2023-5475
Published
Oct 11, 2023
Updated
Feb 13, 2025
Vendor
Google Cloud
Product
Google Chrome
Classifications
T1176.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 11, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 13, 2025Record 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=118.0.5993.70 <118.0.5993.70

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Google Cloud · Google Chromeversion=118.0.5993.70 <118.0.5993.70

Published CVSS scores

6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/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

T1176.001Browser 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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