CVE-2020-8161

Name: CVE-2020-8161
Creator: NVD / NIST
Published: 2020-07-02T19:15:12.357+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.6/10EPSS 3.59%

Last modified Jun 17, 2026

CVE-2020-8161 is a high-severity vulnerability rated 8.6/10 on the CVSS scale. A directory traversal vulnerability exists in rack < 2.2.0 that allows an attacker perform directory traversal vulnerability in the Rack::Directory app that is bundled with Rack which could result in information disclosure.. EPSS estimates a 3.59% chance of exploitation in the next 30 days.

Description

A directory traversal vulnerability exists in rack < 2.2.0 that allows an attacker perform directory traversal vulnerability in the Rack::Directory app that is bundled with Rack which could result in information disclosure.

Metrics

CVSS 3.1

8.6/10

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

EPSS Probability

3.59%

88.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Rack Project	Rack	< 2.2.0
Debian	Debian Linux	9.0
Debian	Debian Linux	10.0
Canonical	Ubuntu Linux	18.04

References

https://groups.google.com/g/rubyonrails-security/c/IOO1vNZTzPAMailing List, Patch, Third Party Advisory
https://hackerone.com/reports/434404Permissions Required, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2020/07/msg00006.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2023/01/msg00038.htmlMailing List, Third Party Advisory
https://usn.ubuntu.com/4561-1/Third Party Advisory
https://groups.google.com/g/rubyonrails-security/c/IOO1vNZTzPAMailing List, Patch, Third Party Advisory
https://hackerone.com/reports/434404Permissions Required, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2020/07/msg00006.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2023/01/msg00038.htmlMailing List, Third Party Advisory
https://usn.ubuntu.com/4561-1/Third Party Advisory

Timeline

Published: Jul 2, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-8161?

How severe is CVE-2020-8161?

CVE-2020-8161 has a CVSS score of 8.6/10 (HIGH severity). The EPSS model estimates a 3.59% probability of exploitation in the next 30 days.

How do I fix CVE-2020-8161?

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-2020-8161?

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

Scan your code now

Source: NVD / NIST