CVE-2021-23374Public exploitNetwork attack vector

Arbitrary command execution via unsanitized kill argument

Published Apr 18, 2021 · Updated Sep 16, 2024

OS command injection in WisdomKwan ps-visitor allows attackers to execute arbitrary shell commands through a crafted kill() pid argument. The kill() implementation interpolates pid directly into a shell command and passes it to child_process.exec without quoting, escaping, or validation. Exploitation requires an application to pass attacker-controlled data into the library API; commands run with that application's privileges.

CVSS severity7.3
High
EPSS probability1.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in WisdomKwan ps-visitor allows attackers to execute arbitrary shell commands through a crafted kill() pid argument. The kill() implementation interpolates pid directly into a shell command and passes it to child_process.exec without quoting, escaping, or validation. Exploitation requires an application to pass attacker-controlled data into the library API; commands run with that application's privileges.

The record

CVE
CVE-2021-23374
Published
Apr 18, 2021
Updated
Sep 16, 2024
Vendor
WisdomKwan
Product
ps-visitor
Classifications
CWE-78, T1059.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 18, 2021CVE 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=0 <unspecified

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

WisdomKwan · ps-visitorversion=0 <unspecified

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.5NIST NVDAV:N/AC:L/Au:N/C:P/I:P/A:P
7.3SnykCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

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-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059.004Unix Shell

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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