What is CVE-2021-39123?

CVE-2021-39123 is a Denial of Service (DoS) vulnerability in Atlassian Jira Server and Data Center before version 8.16.0, which allows unauthenticated remote attackers to impact the application's availability.

What is the severity of CVE-2021-39123?

The severity of CVE-2021-39123 is high, with a severity value of 7.5.

Which versions of Atlassian Jira Server and Data Center are affected by CVE-2021-39123?

Versions of Atlassian Jira Server and Data Center before version 8.16.0 are affected by CVE-2021-39123.

How can an unauthenticated remote attacker exploit CVE-2021-39123?

An unauthenticated remote attacker can exploit CVE-2021-39123 by sending malicious requests to the /rest/gadget/1.0/createdVsResolved/generate endpoint, causing a Denial of Service (DoS) and impacting the availability of the application.

Is there a fix available for CVE-2021-39123?

Yes, the fix for CVE-2021-39123 is to update Atlassian Jira Server and Data Center to version 8.16.0 or higher.

Vulnerability/
CVE-2021-39123

high

7.5

14/9/2021

10/10/2024

CVE-2021-39123

First published: Tue Sep 14 2021(Updated: )

Affected versions of Atlassian Jira Server and Data Center allow unauthenticated remote attackers to impact the application's availability via a Denial of Service (DoS) vulnerability in the /rest/gadget/1.0/createdVsResolved/generate endpoint. The affected versions are before version 8.16.0.

Credit: security@atlassian.com security@atlassian.com

Affected Software	Affected Version	How to fix
Atlassian Data Center	<8.16.0
Atlassian JIRA	<8.16.0

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Reference Links

https://jira.atlassian.com/browse/JRASERVER-72237

Frequently Asked Questions

What is CVE-2021-39123?
CVE-2021-39123 is a Denial of Service (DoS) vulnerability in Atlassian Jira Server and Data Center before version 8.16.0, which allows unauthenticated remote attackers to impact the application's availability.
What is the severity of CVE-2021-39123?
The severity of CVE-2021-39123 is high, with a severity value of 7.5.
Which versions of Atlassian Jira Server and Data Center are affected by CVE-2021-39123?
Versions of Atlassian Jira Server and Data Center before version 8.16.0 are affected by CVE-2021-39123.
How can an unauthenticated remote attacker exploit CVE-2021-39123?
An unauthenticated remote attacker can exploit CVE-2021-39123 by sending malicious requests to the /rest/gadget/1.0/createdVsResolved/generate endpoint, causing a Denial of Service (DoS) and impacting the availability of the application.
Is there a fix available for CVE-2021-39123?
Yes, the fix for CVE-2021-39123 is to update Atlassian Jira Server and Data Center to version 8.16.0 or higher.

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vendor/atlassian
canonical/atlassian data center
canonical/atlassian jira

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