What’s Vulnerable › Vulnerabilities
CVE-2021-43943
- Severity: medium (CVSS 4.8 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.4% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2022-02-24 · updated 2026-06-17
- Weakness: CWE-79
Description
Affected versions of Atlassian Jira Service Management Server and Data Center allow attackers with administrator privileges to inject arbitrary HTML or JavaScript via a Cross-Site Scripting (XSS) vulnerability in the "Object Schema" field of /secure/admin/InsightDefaultCustomFieldConfig.jspa. The affected versions are before version 4.21.0.
Affected products
- Atlassian Jira Service Management: before 4.21.0 — fixed in 4.21.0
How to fix
Upgrade to a fixed version: Atlassian Jira Service Management 4.21.0. Check the vendor advisory for mitigations.
References
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