CVE-2020-28423Public exploitNetwork attack vector

Arbitrary command execution via unsanitized build arguments

Published Aug 2, 2022 · Updated Sep 16, 2024

Command injection in monorepo-build 0.1.9 and earlier allows attackers to execute arbitrary operating-system commands via build inputs. The build function sends its second and third arguments to shell parsing without neutralizing command separators, so appended commands run. Exploitation requires attacker-controlled values to reach those arguments; commands execute with the privileges of the process using the package.

CVSS severity9.8
Critical
EPSS probability1.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Command injection in monorepo-build 0.1.9 and earlier allows attackers to execute arbitrary operating-system commands via build inputs. The build function sends its second and third arguments to shell parsing without neutralizing command separators, so appended commands run. Exploitation requires attacker-controlled values to reach those arguments; commands execute with the privileges of the process using the package.

The record

CVE
CVE-2020-28423
Published
Aug 2, 2022
Updated
Sep 16, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-77, T1059
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 2, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

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

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.

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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-77Improper Neutralization of Special Elements used in a Command ('Command Injection')
T1059Command and Scripting Interpreter

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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