CVE-2021-23379: This affects all versions of package portkiller

This week

HIGH 7.3REMOTEMITIGATE

CVE-2021-23379 is a high-severity flaw (CVSS 7.3) affecting portkiller. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

This affects all versions of package portkiller. If (attacker-controlled) user input is given, it is possible for an attacker to execute arbitrary commands. This is due to use of the child_process exec function without input sanitization.

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.3 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.3% (top 29%)
CISA exploited list	No
Weakness	CWE-78
Published	2021-04-18
Last modified	2026-06-17

Publisher (CNA): Snyk · Vendor: portkiller project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2021-04-18 19:15 UTCPublished CVE record published
2026-06-17 03:38 UTCUpdated Record last modified

portkiller project portkiller MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

npm ls portkiller

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-23379?

portkiller: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2021-23379 being exploited?

CVE-2021-23379 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-23379 affect?

CVE-2021-23379 affects portkiller. Severity is high (CVSS 7.3). This affects all versions of package portkiller. If (attacker-controlled) user input is given, it is possible for an attacker to execute arbitrary commands. This is due to use of the child_process exec function without input sanitization.

How urgent is CVE-2021-23379?

Priority 53/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

References

← Back to latest CVEs