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Vulnerability record · CVE-2020-24916 · published 9 September 2020

CVE-2020-24916: Yaws os command injection vulnerability

Yaws · Yaws

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

9.8 CVSS 3.1 Critical EPSS 17% · top 3.0% CWE-78 · OS command injection
9.8CVSS 3.1 base score, v2 10.0
17%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
14References, 6 tagged exploit
17 Jun 2026Last modified by NVD

Description

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

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

Affected products

3 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/erlyaws/yaws/commits/master PatchThird Party Advisory
https://github.com/vulnbe/poc-yaws-cgi-shell-injection ExploitThird Party Advisory
https://lists.debian.org/debian-lts-announce/2020/09/msg00022.html Mailing ListThird Party Advisory
https://packetstormsecurity.com/files/159106/Yaws-2.0.7-XML-Injection-Command-Injection.html ExploitThird Party AdvisoryVDB Entry
https://usn.ubuntu.com/4569-1/ Third Party Advisory
https://vuln.be/post/yaws-xxe-and-shell-injections/ ExploitThird Party Advisory
https://www.debian.org/security/2020/dsa-4773 Third Party Advisory
https://github.com/erlyaws/yaws/commits/master PatchThird Party Advisory
https://github.com/vulnbe/poc-yaws-cgi-shell-injection ExploitThird Party Advisory
https://lists.debian.org/debian-lts-announce/2020/09/msg00022.html Mailing ListThird Party Advisory
https://packetstormsecurity.com/files/159106/Yaws-2.0.7-XML-Injection-Command-Injection.html ExploitThird Party AdvisoryVDB Entry
https://usn.ubuntu.com/4569-1/ Third Party Advisory
https://vuln.be/post/yaws-xxe-and-shell-injections/ ExploitThird Party Advisory
https://www.debian.org/security/2020/dsa-4773 Third Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2020-24916), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.