CVE-2022-25893Public exploitNetwork attack vector

Host code execution via mutable WeakMap prototype

Published Dec 21, 2022 · Updated Apr 15, 2025

Code injection in Patrik Simek vm2 before 3.9.10 allows remote attackers to execute code on the host through sandboxed JavaScript. The setup-sandbox.js wrapper invokes WeakMap.prototype.set through a mutable prototype lookup, so sandbox code can replace the method and recover a host object through Error stack preparation. Exploitation requires an application to run attacker-controlled JavaScript in vm2 and grants access to the host process outside the intended sandbox.

CVSS severity9.8
Critical
EPSS probability1.43%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Code injection in Patrik Simek vm2 before 3.9.10 allows remote attackers to execute code on the host through sandboxed JavaScript. The setup-sandbox.js wrapper invokes WeakMap.prototype.set through a mutable prototype lookup, so sandbox code can replace the method and recover a host object through Error stack preparation. Exploitation requires an application to run attacker-controlled JavaScript in vm2 and grants access to the host process outside the intended sandbox.

The record

CVE
CVE-2022-25893
Published
Dec 21, 2022
Updated
Apr 15, 2025
Vendor
Patrik Simek
Product
vm2
Classifications
CWE-94, T1059.007
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 21, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 15, 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=unspecified <3.9.10

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Patrik Simek · vm2version=unspecified <3.9.10

Published CVSS scores

9.8GitHub Advisory DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8SnykCVSS: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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-94Improper Control of Generation of Code ('Code Injection')
T1059.007JavaScript/JScript

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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