CVE-2021-23363

Name: CVE-2021-23363
Creator: NVD / NIST
Published: 2021-03-30T15:15:15.48+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 1.76%

Last modified Jun 17, 2026

CVE-2021-23363 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. This affects the package kill-by-port before 0.0.2. If (attacker-controlled) user input is given to the killByPort function, it is possible for an attacker to execute arbitrary commands. EPSS estimates a 1.76% chance of exploitation in the next 30 days.

Description

This affects the package kill-by-port before 0.0.2. If (attacker-controlled) user input is given to the killByPort function, it is possible for an attacker to execute arbitrary commands. This is due to use of the child_process exec function without input sanitization.

Metrics

CVSS 3.1

8.8/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

1.76%

75.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-78

Affected Software

Vendor	Product	Versions
Kill-By-Port Project	Kill-By-Port	< 0.0.2

References

https://github.com/GuyMograbi/kill-by-port/blob/16dcbe264b6b4a5ecf409661b42836dd286fd43f/index.js%23L8Broken Link
https://github.com/GuyMograbi/kill-by-port/commit/ea5b1f377e196a4492e05ff070eba8b30b7372c4Patch, Third Party Advisory
https://snyk.io/vuln/SNYK-JS-KILLBYPORT-1078531Exploit, Third Party Advisory
https://github.com/GuyMograbi/kill-by-port/blob/16dcbe264b6b4a5ecf409661b42836dd286fd43f/index.js%23L8Broken Link
https://github.com/GuyMograbi/kill-by-port/commit/ea5b1f377e196a4492e05ff070eba8b30b7372c4Patch, Third Party Advisory
https://snyk.io/vuln/SNYK-JS-KILLBYPORT-1078531Exploit, Third Party Advisory

Timeline

Published: Mar 30, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-23363?

How severe is CVE-2021-23363?

CVE-2021-23363 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 1.76% probability of exploitation in the next 30 days.

How do I fix CVE-2021-23363?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-23363?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST