CVE-2022-21122Public exploitNetwork attack vector

Arbitrary code execution via exposed Math constructor

Published Jun 3, 2022 · Updated Sep 16, 2024

Code injection in Metarhia Metacalc before 0.0.2 allows attackers to execute arbitrary JavaScript through crafted spreadsheet formulas. The Sheet expression evaluator exposes the native Math object inside its v8 context, allowing a formula to traverse a Math method's constructor and reach Function. Exploitation requires an application to evaluate attacker-controlled cell formulas; resulting code runs with the privileges and data access of the hosting Node.js process.

CVSS severity9.0
Critical
EPSS probability2.51%
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 Metarhia Metacalc before 0.0.2 allows attackers to execute arbitrary JavaScript through crafted spreadsheet formulas. The Sheet expression evaluator exposes the native Math object inside its v8 context, allowing a formula to traverse a Math method's constructor and reach Function. Exploitation requires an application to evaluate attacker-controlled cell formulas; resulting code runs with the privileges and data access of the hosting Node.js process.

The record

CVE
CVE-2022-21122
Published
Jun 3, 2022
Updated
Sep 16, 2024
Vendor
Metarhia
Product
Metacalc
Classifications
CWE-94, T1059.007
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 3, 2022CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 2024Record 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 <0.0.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Metarhia · Metacalcversion=unspecified <0.0.2

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.0GitHub Advisory DatabaseCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/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')
T1059.007Command and Scripting Interpreter: JavaScript

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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