CVE-2021-39117: Atlassian Data Center

Medium severity, CVSS 4.8. EPSS: 0.6% chance of exploitation in the next 30 days.

The AssociateFieldToScreens page in Atlassian Jira Server and Data Center before version 8.18.0 allows remote attackers to inject arbitrary HTML or JavaScript via a Cross-Site Scripting (XSS) vulnerability via the name of a custom field.

Affected products

• Atlassian Data Center: before 8.18.0 (fixed in 8.18.0)
• Atlassian Jira: before 8.18.0 (fixed in 8.18.0)

Published 2021-08-30. Last modified 2026-06-17.