CVE-2021-43942

6.1 mediumEPSS 55%

Medium (6.1) in atlassian. EPSS 55% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

6.1 medium

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

EPSS: 55% chance of exploitation in the next 30 days; higher than 99% of CVEs (scores of 2026-10-31)
CWE: CWE-79
Published: 2022-01-04
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

atlassian:jira_server
atlassian:jira_server_and_data_center

References

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

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