CVE-2023-32313Public exploitNetwork attack vector

Host console disruption via writable inspect reference

Published May 15, 2023 · Updated Jan 22, 2025

Improper isolation in Patrik Simek vm2 3.9.17 and earlier allows remote attackers to modify host console.log behavior via sandboxed code. A custom nodejs.util.inspect.custom hook receives the host util.inspect function during Buffer error formatting, and vm2 exposes that reference as writable. Execution of attacker-controlled JavaScript inside a VM instance is required; changing inspect.colors can make later host console.log calls throw a TypeError.

CVSS severity5.3
Medium
EPSS probability0.79%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper isolation in Patrik Simek vm2 3.9.17 and earlier allows remote attackers to modify host console.log behavior via sandboxed code. A custom nodejs.util.inspect.custom hook receives the host util.inspect function during Buffer error formatting, and vm2 exposes that reference as writable. Execution of attacker-controlled JavaScript inside a VM instance is required; changing inspect.colors can make later host console.log calls throw a TypeError.

The record

CVE
CVE-2023-32313
Published
May 15, 2023
Updated
Jan 22, 2025
Vendor
Patrik Simek
Product
vm2
Classifications
CWE-74, T1565.003
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 15, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 22, 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=< 3.9.18

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Patrik Simek · vm2version=< 3.9.18

Published CVSS scores

5.3NISTCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
5.3GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/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 exploitPublished

Weakness, pattern, technique

CWE-74Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
T1565.003Runtime Data Manipulation

Public exploit references

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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