Medium [CVE-2021-43942] Affected versions of Atlassian Jira Server and Data Center allow remote attackers to inject arbitrary HTML or JavaScript
This medium-severity Atlassian advisory covers CVE-2021-43942 affecting Jira.
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Summary
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.
- 8.14.0
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
- 8.20.3
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
Mitigation
Upgrade to a fixed release: 8.20.3. That is the remediation for this advisory.
The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
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