Description
CGI implementation in Yaws web server versions 1.81 to 2.0.7 is vulnerable to OS command injection.
References (7)
Core 7
Core References
Patch, Third Party Advisory x_refsource_misc
https://github.com/erlyaws/yaws/commits/master
Exploit, Third Party Advisory, VDB Entry x_refsource_misc
https://packetstormsecurity.com/files/159106/Yaws-2.0.7-XML-Injection-Command-Injection.html
Exploit, Third Party Advisory x_refsource_misc
https://vuln.be/post/yaws-xxe-and-shell-injections/
Exploit, Third Party Advisory x_refsource_misc
https://github.com/vulnbe/poc-yaws-cgi-shell-injection
Mailing List, Third Party Advisory mailing-list
x_refsource_mlist
https://lists.debian.org/debian-lts-announce/2020/09/msg00022.html
Third Party Advisory vendor-advisory
x_refsource_ubuntu
https://usn.ubuntu.com/4569-1/
Third Party Advisory vendor-advisory
x_refsource_debian
https://www.debian.org/security/2020/dsa-4773
Scores
CVSS v3
9.8
EPSS
0.4425
EPSS Percentile
97.6%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Details
CWE
CWE-78
Status
published
Products (4)
canonical/ubuntu_linux
18.04
debian/debian_linux
9.0
debian/debian_linux
10.0
yaws/yaws
1.81 - 2.0.7
Published
Sep 09, 2020
Tracked Since
Feb 18, 2026