CVE-2020-13388

Name: CVE-2020-13388
Creator: NVD / NIST
Published: 2020-05-22T17:15:10.957+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 4.42%

Last modified Jun 17, 2026

CVE-2020-13388 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. An exploitable vulnerability exists in the configuration-loading functionality of the jw.util package before 2.3 for Python. When loading a configuration with FromString or FromStream with YAML, one can execute arbitrary Python code, resulting in OS command execution, because safe_load is not used.. EPSS estimates a 4.42% chance of exploitation in the next 30 days.

Description

An exploitable vulnerability exists in the configuration-loading functionality of the jw.util package before 2.3 for Python. When loading a configuration with FromString or FromStream with YAML, one can execute arbitrary Python code, resulting in OS command execution, because safe_load is not used.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

4.42%

90.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-78

Affected Software

Vendor	Product	Versions
Python	Jw.Util	< 2.3

References

https://joel-malwarebenchmark.github.ioExploit, Third Party Advisory
https://joel-malwarebenchmark.github.io/blog/2020/04/27/cve-2020-13388-jw-util-vulnerability/Exploit, Third Party Advisory
https://security.netapp.com/advisory/ntap-20200528-0002/Third Party Advisory
https://joel-malwarebenchmark.github.ioExploit, Third Party Advisory
https://joel-malwarebenchmark.github.io/blog/2020/04/27/cve-2020-13388-jw-util-vulnerability/Exploit, Third Party Advisory
https://security.netapp.com/advisory/ntap-20200528-0002/Third Party Advisory

Timeline

Published: May 22, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-13388?

How severe is CVE-2020-13388?

CVE-2020-13388 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 4.42% probability of exploitation in the next 30 days.

How do I fix CVE-2020-13388?

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-2020-13388?

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

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Source: NVD / NIST