What is CVE-2021-43942?

CVE-2021-43942 is a vulnerability in Atlassian Jira Server and Data Center that allows remote attackers to inject arbitrary HTML or JavaScript via a Reflected Cross-Site Scripting (XSS) vulnerability.

How does CVE-2021-43942 affect Atlassian Jira Server?

CVE-2021-43942 affects Atlassian Jira Server versions between 8.14.0 and 8.20.3.

How does CVE-2021-43942 affect Atlassian Jira Server and Data Center?

CVE-2021-43942 affects Atlassian Jira Server and Data Center versions up to 8.13.5.

What is the severity of CVE-2021-43942?

CVE-2021-43942 has a severity rating of medium with a CVSS score of 6.1.

How can I fix CVE-2021-43942?

To fix CVE-2021-43942, upgrade Atlassian Jira Server to version 8.20.3 or later, and Atlassian Jira Server and Data Center to version 8.13.5 or later.

Vulnerability/
CVE-2021-43942

medium

6.1

CWE

4/1/2022

21/11/2024

CVE-2021-43942: XSS

First published: Tue Jan 04 2022(Updated: )

Affected versions of Atlassian Jira Server and Data Center allow remote attackers to inject arbitrary HTML or JavaScript via a Reflected Cross-Site Scripting (XSS) vulnerability in the /rest/collectors/1.0/template/custom endpoint. To exploit this issue, the attacker must trick a user into visiting a malicious website. The affected versions are before version 8.13.15, and from version 8.14.0 before 8.20.3.

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

Affected Software	Affected Version	How to fix
Atlassian Jira Server	>=8.14.0<8.20.3
Atlassian Jira Server and Data Center	<8.13.5
	>=8.14.0<8.20.3
	<8.13.5

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Reference Links

https://jira.atlassian.com/browse/JRASERVER-73068

Frequently Asked Questions

What is CVE-2021-43942?
CVE-2021-43942 is a vulnerability in Atlassian Jira Server and Data Center that allows remote attackers to inject arbitrary HTML or JavaScript via a Reflected Cross-Site Scripting (XSS) vulnerability.
How does CVE-2021-43942 affect Atlassian Jira Server?
CVE-2021-43942 affects Atlassian Jira Server versions between 8.14.0 and 8.20.3.
How does CVE-2021-43942 affect Atlassian Jira Server and Data Center?
CVE-2021-43942 affects Atlassian Jira Server and Data Center versions up to 8.13.5.
What is the severity of CVE-2021-43942?
CVE-2021-43942 has a severity rating of medium with a CVSS score of 6.1.
How can I fix CVE-2021-43942?
To fix CVE-2021-43942, upgrade Atlassian Jira Server to version 8.20.3 or later, and Atlassian Jira Server and Data Center to version 8.13.5 or later.

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agent/type
agent/weakness
agent/references
agent/severity
agent/description
agent/first-publish-date
collector/mitre-cve
source/MITRE
collector/nvd-api
source/NVD
agent/software-canonical-lookup
agent/last-modified-date
agent/author
agent/softwarecombine
agent/tags
agent/event
vendor/atlassian
canonical/atlassian jira server
version/atlassian jira server/8.14.0
canonical/atlassian jira server and data center

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