CVE-2021-43942

Description

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.

Category

6.1
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 2.96% Top 15%
Vendor Advisory atlassian.com
Affected: Atlassian Jira Server
Affected: Atlassian Jira Data Center
Published at:
Updated at:

References

Link Tags
https://jira.atlassian.com/browse/JRASERVER-73068 vendor advisory issue tracking

Frequently Asked Questions

What is the severity of CVE-2021-43942?
CVE-2021-43942 has been scored as a medium severity vulnerability.
How to fix CVE-2021-43942?
To fix CVE-2021-43942, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-43942 being actively exploited in the wild?
It is possible that CVE-2021-43942 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~3% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-43942?
CVE-2021-43942 affects Atlassian Jira Server, Atlassian Jira Data Center.
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