CVE-2023-4078Network attack vector

Privileged-page script injection via malicious extension

Published Aug 3, 2023 · Updated Feb 13, 2025

Improper extension handling in Google Chrome before 115.0.5790.170 allows attackers to inject script or HTML into a privileged page. Google identifies the Extensions component but has not published the faulty operation or validation error that permits the injection. Exploitation requires convincing a user to install a crafted malicious extension, after which injected content reaches the privileged-page context.

CVSS severity8.8
High
EPSS probability0.90%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper extension handling in Google Chrome before 115.0.5790.170 allows attackers to inject script or HTML into a privileged page. Google identifies the Extensions component but has not published the faulty operation or validation error that permits the injection. Exploitation requires convincing a user to install a crafted malicious extension, after which injected content reaches the privileged-page context.

The record

CVE
CVE-2023-4078
Published
Aug 3, 2023
Updated
Feb 13, 2025
Vendor
Google Cloud
Product
Google Chrome
Classifications
T1176
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 3, 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=115.0.5790.170 <115.0.5790.170

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Google Cloud · Google Chromeversion=115.0.5790.170 <115.0.5790.170

Published CVSS scores

8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

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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