CVE-2021-21371

Name: CVE-2021-21371
Creator: NVD / NIST
Published: 2021-03-10T22:15:12.307+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.6/10EPSS 0.45%

Last modified Jun 17, 2026

CVE-2021-21371 is a high-severity vulnerability rated 8.6/10 on the CVSS scale. Tenable for Jira Cloud is an open source project designed to pull Tenable.io vulnerability data, then generate Jira Tasks and sub-tasks based on the vulnerabilities' current state. It published in pypi as "tenable-jira-cloud". EPSS estimates a 0.45% chance of exploitation in the next 30 days.

Description

Tenable for Jira Cloud is an open source project designed to pull Tenable.io vulnerability data, then generate Jira Tasks and sub-tasks based on the vulnerabilities' current state. It published in pypi as "tenable-jira-cloud". In tenable-jira-cloud before version 1.1.21, it is possible to run arbitrary commands through the yaml.load() method. This could allow an attacker with local access to the host to run arbitrary code by running the application with a specially crafted YAML configuration file. This is fixed in version 1.1.21 by using yaml.safe_load() instead of yaml.load().

Metrics

CVSS 3.1

8.6/10

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

EPSS Probability

0.45%

36.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-502

Affected Software

Vendor	Product	Versions
Tenable	Jira Cloud	< 1.1.21

References

https://github.com/tenable/integration-jira-cloud/commit/f8c2095fd529e664e7fa25403a0a4a85bb3907d0Patch, Third Party Advisory
https://github.com/tenable/integration-jira-cloud/security/advisories/GHSA-8278-88vv-x98rThird Party Advisory
https://pypi.org/project/tenable-jira-cloud/Product, Third Party Advisory
https://pyyaml.docsforge.com/master/documentation/#loading-yamlThird Party Advisory
https://github.com/tenable/integration-jira-cloud/commit/f8c2095fd529e664e7fa25403a0a4a85bb3907d0Patch, Third Party Advisory
https://github.com/tenable/integration-jira-cloud/security/advisories/GHSA-8278-88vv-x98rThird Party Advisory
https://pypi.org/project/tenable-jira-cloud/Product, Third Party Advisory
https://pyyaml.docsforge.com/master/documentation/#loading-yamlThird Party Advisory

Timeline

Published: Mar 10, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-21371?

How severe is CVE-2021-21371?

CVE-2021-21371 has a CVSS score of 8.6/10 (HIGH severity). The EPSS model estimates a 0.45% probability of exploitation in the next 30 days.

How do I fix CVE-2021-21371?

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-2021-21371?

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

Scan your code now

Source: NVD / NIST