CVE-2023-23623Network attack vector

JavaScript execution via unenforced renderer CSP

Published Sep 6, 2023 · Updated Sep 26, 2024

CSP bypass in Electron 22.0.0-beta.1 through 22.0.0 and 23.0.0-alpha.1 allows attackers to execute blocked JavaScript. The renderer's CSP enforcement permits eval() and new Function() even when script-src excludes unsafe-eval. Reachability requires both sandbox and contextIsolation to be disabled, exposing CSP-blocked dynamic code execution in that renderer.

CVSS severity7.5
High
EPSS probability0.66%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

CSP bypass in Electron 22.0.0-beta.1 through 22.0.0 and 23.0.0-alpha.1 allows attackers to execute blocked JavaScript. The renderer's CSP enforcement permits eval() and new Function() even when script-src excludes unsafe-eval. Reachability requires both sandbox and contextIsolation to be disabled, exposing CSP-blocked dynamic code execution in that renderer.

The record

CVE
CVE-2023-23623
Published
Sep 6, 2023
Updated
Sep 26, 2024
Vendor
Electron
Product
Electron
Classifications
CWE-670, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 6, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 26, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 22.0.0-beta.1, < 22.0.1
  2. Affected versionversion=22.0.0_beta.1 <22.0.1
  3. Affected versionversion=>= 23.0.0-alpha.1, < 23.0.0-alpha.2
  4. Affected versionversion=23.0.0_alpha.1 <23.0.0_alpha.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Electron · Electronversion=>= 22.0.0-beta.1, < 22.0.1; version=22.0.0_beta.1 <22.0.1; version=>= 23.0.0-alpha.1, < 23.0.0-alpha.2; version=23.0.0_alpha.1 <23.0.0_alpha.2

Published CVSS scores

7.5GitHub, Inc.CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-670Always-Incorrect Control Flow Implementation
T1059.007JavaScript/JScript

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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