CVE-2021-39118

Name: CVE-2021-39118
Creator: NVD / NIST
Published: 2021-09-14T05:15:09.9+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.3/10EPSS 1.38%

Last modified Jun 17, 2026

CVE-2021-39118 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. Affected versions of Atlassian Jira Server and Data Center allow remote attackers to discover the usernames and full names of users via an enumeration vulnerability in the /rest/api/1.0/render endpoint. The affected versions are before version 8.19.0.. EPSS estimates a 1.38% chance of exploitation in the next 30 days.

Description

Affected versions of Atlassian Jira Server and Data Center allow remote attackers to discover the usernames and full names of users via an enumeration vulnerability in the /rest/api/1.0/render endpoint. The affected versions are before version 8.19.0.

Metrics

CVSS 3.1

5.3/10

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

EPSS Probability

1.38%

68.6th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Atlassian	Data Center	< 8.19.0
Atlassian	Jira	< 8.19.0

References

https://jira.atlassian.com/browse/JRASERVER-72736Vendor Advisory
https://jira.atlassian.com/browse/JRASERVER-72736Vendor Advisory

Timeline

Published: Sep 14, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-39118?

How severe is CVE-2021-39118?

CVE-2021-39118 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 1.38% probability of exploitation in the next 30 days.

How do I fix CVE-2021-39118?

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-2021-39118?

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

Scan your code now

Source: NVD / NIST