CVE-2021-20228

Name: CVE-2021-20228
Creator: NVD / NIST
Published: 2021-04-29T16:15:09.737+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 2.04%

Last modified Jun 17, 2026

CVE-2021-20228 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. A flaw was found in the Ansible Engine 2.9.18, where sensitive info is not masked by default and is not protected by the no_log feature when using the sub-option feature of the basic.py module. This flaw allows an attacker to obtain sensitive information. EPSS estimates a 2.04% chance of exploitation in the next 30 days.

Description

A flaw was found in the Ansible Engine 2.9.18, where sensitive info is not masked by default and is not protected by the no_log feature when using the sub-option feature of the basic.py module. This flaw allows an attacker to obtain sensitive information. The highest threat from this vulnerability is to confidentiality.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

2.04%

78.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Redhat	Ansible Engine	2.9.18
Redhat	Ansible Automation Platform	1.2
Redhat	Ansible Engine	2.0
Redhat	Ansible Engine	2.9
Redhat	Ansible Tower	3.0
Debian	Debian Linux	10.0

References

https://bugzilla.redhat.com/show_bug.cgi?id=1925002Issue Tracking, Third Party Advisory
https://github.com/ansible/ansible/pull/73487Patch, Third Party Advisory
https://www.debian.org/security/2021/dsa-4950Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1925002Issue Tracking, Third Party Advisory
https://github.com/ansible/ansible/pull/73487Patch, Third Party Advisory
https://www.debian.org/security/2021/dsa-4950Third Party Advisory

Timeline

Published: Apr 29, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-20228?

How severe is CVE-2021-20228?

CVE-2021-20228 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 2.04% probability of exploitation in the next 30 days.

How do I fix CVE-2021-20228?

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-2021-20228?

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

Scan your code now

Source: NVD / NIST