CVE-2021-39127

Name: CVE-2021-39127
Creator: NVD / NIST
Published: 2021-10-21T03:15:07.177+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.3/10EPSS 1.27%

Last modified Jun 17, 2026

CVE-2021-39127 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. Affected versions of Atlassian Jira Server and Data Center allow anonymous remote attackers to the query component JQL endpoint via a Broken Access Control vulnerability (BAC) vulnerability. The affected versions are before version 8.5.10, and from version 8.6.0 before 8.13.1.. EPSS estimates a 1.27% chance of exploitation in the next 30 days.

Description

Affected versions of Atlassian Jira Server and Data Center allow anonymous remote attackers to the query component JQL endpoint via a Broken Access Control vulnerability (BAC) vulnerability. The affected versions are before version 8.5.10, and from version 8.6.0 before 8.13.1.

Metrics

CVSS 3.1

5.3/10

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

EPSS Probability

1.27%

66.2th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Atlassian	Jira	< 8.5.10
Atlassian	Jira Data Center	>= 8.6.0, < 8.13.1
Atlassian	Jira Server	>= 8.6.0, < 8.13.1
Atlassian	Jira Software Data Center	< 8.5.10

References

https://jira.atlassian.com/browse/JRASERVER-72003Issue Tracking, Patch, Vendor Advisory
https://jira.atlassian.com/browse/JRASERVER-72003Issue Tracking, Patch, Vendor Advisory

Timeline

Published: Oct 21, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-39127?

How severe is CVE-2021-39127?

CVE-2021-39127 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 1.27% probability of exploitation in the next 30 days.

How do I fix CVE-2021-39127?

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-2021-39127?

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

Scan your code now

Source: NVD / NIST