CVE-2019-3403: Atlassian Jira

Medium severity, CVSS 5.3. EPSS: 52.6% chance of exploitation in the next 30 days.

The /rest/api/2/user/picker rest resource in Jira before version 7.13.3, from version 8.0.0 before version 8.0.4, and from version 8.1.0 before version 8.1.1 allows remote attackers to enumerate usernames via an incorrect authorisation check.

Affected products

• Atlassian Jira: before 7.13.3 (fixed in 7.13.3)
• Atlassian Jira Server: from 8.0.0, before 8.0.4 (fixed in 8.0.4); from 8.1.0, before 8.1.1 (fixed in 8.1.1)

Published 2019-05-22. Last modified 2026-06-17.