CVE-2020-8131

Name: CVE-2020-8131
Creator: NVD / NIST
Published: 2020-02-24T15:15:12.02+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 5.03%

Last modified Jun 17, 2026

CVE-2020-8131 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. Arbitrary filesystem write vulnerability in Yarn before 1.22.0 allows attackers to write to any path on the filesystem and potentially lead to arbitrary code execution by forcing the user to install a malicious package.. EPSS estimates a 5.03% chance of exploitation in the next 30 days.

Description

Arbitrary filesystem write vulnerability in Yarn before 1.22.0 allows attackers to write to any path on the filesystem and potentially lead to arbitrary code execution by forcing the user to install a malicious package.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

5.03%

91.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Yarnpkg	Yarn	<= 1.21.1

References

https://github.com/yarnpkg/yarn/pull/7831Patch, Third Party Advisory
https://hackerone.com/reports/730239Exploit, Third Party Advisory
https://github.com/yarnpkg/yarn/pull/7831Patch, Third Party Advisory
https://hackerone.com/reports/730239Exploit, Third Party Advisory

Timeline

Published: Feb 24, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-8131?

How severe is CVE-2020-8131?

CVE-2020-8131 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 5.03% probability of exploitation in the next 30 days.

How do I fix CVE-2020-8131?

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-2020-8131?

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

Scan your code now

Source: NVD / NIST