Auth bypass in Atlassian Jira

CVE-2019-3403

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 che…

Vulnerability class: Broken Access Control

EPSS: 0.526 (98.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2019-3403?
CVE-2019-3403 is a medium-severity vulnerability in Atlassian Jira, classified under Incorrect Authorization. CVSS score: 5.3/10. Published 2019-05-22.
How severe is CVE-2019-3403?
Medium severity. CVSS v3 base score is 5.3 out of 10.
Is CVE-2019-3403 known to be exploited?
15 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.