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CVE-2020-24916

CriticalPublished

CGI implementation in Yaws web server versions 1.81 to 2.0.7 is vulnerable to OS command injection.

Published: Sep 9, 2020
Updated: Aug 4, 2024
Assigning CNA: mitre
Evidence observed: Aug 6, 2026

Primary CVSS

9.8/ 10Critical

nvd · CVSS 3.1

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

EPSS probability estimate

17.4%

Moderate · next 30 days

Percentile: 97.0%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

CGI implementation in Yaws web server versions 1.81 to 2.0.7 is vulnerable to OS command injection.

Sources

poc-yaws-cgi-shell-injectionPoC
Yaws web server OS command injection POC

Responsible use

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