What’s Vulnerable › Vulnerabilities

CVE-2021-23363: Arbitrary Command Injection

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.8% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-03-30 · updated 2026-06-17
• Weakness: CWE-78

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.

Affected products

• kill-by-port: before 0.0.2 — fixed in 0.0.2

How to fix

Upgrade to a fixed version: kill-by-port 0.0.2. Check the vendor advisory for mitigations.

References

• https://github.com/GuyMograbi/kill-by-port/blob/16dcbe264b6b4a5ecf409661b42836dd286fd43f/index.js%23L8
• https://github.com/GuyMograbi/kill-by-port/commit/ea5b1f377e196a4492e05ff070eba8b30b7372c4
• https://snyk.io/vuln/SNYK-JS-KILLBYPORT-1078531
• https://github.com/GuyMograbi/kill-by-port/blob/16dcbe264b6b4a5ecf409661b42836dd286fd43f/index.js%23L8
• https://github.com/GuyMograbi/kill-by-port/commit/ea5b1f377e196a4492e05ff070eba8b30b7372c4
• https://snyk.io/vuln/SNYK-JS-KILLBYPORT-1078531

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