CVE-2021-39111: Atlassian Data Center

Medium severity, CVSS 6.1. EPSS: 1.3% chance of exploitation in the next 30 days.

The Editor plugin in Atlassian Jira Server and Data Center before version 8.5.18, from 8.6.0 before 8.13.10, and from version 8.14.0 before 8.18.2 allows remote attackers to inject arbitrary HTML or JavaScript via a Cross-Site Scripting (XSS) vulnerability in the handling of supplied content such as from a PDF when pasted into a field such as the description field.

Affected products

• Atlassian Data Center: before 8.5.18 (fixed in 8.5.18)
• Atlassian Jira: before 8.5.18 (fixed in 8.5.18)
• Atlassian Jira Data Center: from 8.6.0, before 8.13.10 (fixed in 8.13.10); from 8.14.0, before 8.18.2 (fixed in 8.18.2)
• Atlassian Jira Server: from 8.6.0, before 8.13.10 (fixed in 8.13.10); from 8.14.0, before 8.18.2 (fixed in 8.18.2)

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