CVE-2019-8449: Atlassian Jira

Medium severity, CVSS 5.3. EPSS: 84.8% chance of exploitation in the next 30 days.

The /rest/api/latest/groupuserpicker resource in Jira before version 8.4.0 allows remote attackers to enumerate usernames via an information disclosure vulnerability.

Affected products

• Atlassian Jira: before 8.4.0 (fixed in 8.4.0)

Published 2019-09-11. Last modified 2026-06-17.