CVE-2021-41311: Atlassian Jira Software Data Center

High severity, CVSS 7.5. EPSS: 0.9% chance of exploitation in the next 30 days.

Affected versions of Atlassian Jira Server and Data Center allow attackers with access to an administrator account that has had its access revoked to modify projects' Users & Roles settings, via a Broken Authentication vulnerability in the /plugins/servlet/project-config/PROJECT/roles endpoint. The affected versions are before version 8.19.1.

Affected products

• Atlassian Jira Software Data Center: before 8.19.1 (fixed in 8.19.1)

Published 2021-12-08. Last modified 2026-06-17.