CVE-2021-21270

Name: CVE-2021-21270
Creator: NVD / NIST
Published: 2021-01-22T18:15:12.687+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 0.28%

Last modified Jun 17, 2026

CVE-2021-21270 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. OctopusDSC is a PowerShell module with DSC resources that can be used to install and configure an Octopus Deploy Server and Tentacle agent. In OctopusDSC version 4.0.977 and earlier a customer API key used to connect to Octopus Server is exposed via logging in plaintext. EPSS estimates a 0.28% chance of exploitation in the next 30 days.

Description

OctopusDSC is a PowerShell module with DSC resources that can be used to install and configure an Octopus Deploy Server and Tentacle agent. In OctopusDSC version 4.0.977 and earlier a customer API key used to connect to Octopus Server is exposed via logging in plaintext. This vulnerability is patched in version 4.0.1002.

Metrics

CVSS 3.1

5.5/10

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

EPSS Probability

0.28%

19.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-319

Affected Software

Vendor	Product	Versions
Octopus	Octopusdsc	< 4.0.1002

References

https://github.com/OctopusDeploy/OctopusDSC/commit/24b448e6ac964ed938475add494a145c0473ac42Patch, Third Party Advisory
https://github.com/OctopusDeploy/OctopusDSC/pull/270Patch, Third Party Advisory
https://github.com/OctopusDeploy/OctopusDSC/releases/tag/v4.0.1002Release Notes, Third Party Advisory
https://github.com/OctopusDeploy/OctopusDSC/security/advisories/GHSA-phmm-rfg9-94fmThird Party Advisory
https://github.com/OctopusDeploy/OctopusDSC/commit/24b448e6ac964ed938475add494a145c0473ac42Patch, Third Party Advisory
https://github.com/OctopusDeploy/OctopusDSC/pull/270Patch, Third Party Advisory
https://github.com/OctopusDeploy/OctopusDSC/releases/tag/v4.0.1002Release Notes, Third Party Advisory
https://github.com/OctopusDeploy/OctopusDSC/security/advisories/GHSA-phmm-rfg9-94fmThird Party Advisory

Timeline

Published: Jan 22, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-21270?

How severe is CVE-2021-21270?

CVE-2021-21270 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.28% probability of exploitation in the next 30 days.

How do I fix CVE-2021-21270?

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-2021-21270?

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

Scan your code now

Source: NVD / NIST