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CVE-2019-3403

MediumPublished

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...

Published: May 22, 2019
Updated: Sep 17, 2024
Assigning CNA: atlassian
Evidence observed: Aug 8, 2026

Primary CVSS

5.3/ 10Medium

nvd · CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

EPSS probability estimate

52.6%

High · next 30 days

Percentile: 98.9%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

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.

Sources

CVE-2019-3403Exploit
Python script to exploit CVE-2019-3403 for scraping user information from vulnerable JIRA instances via the unauthenticated user search API.
UserEnumJiraExploit
Serie de scripts para enumerar nombres de usuarios de JIRA a partir de vulnerabilidades conocidas (CVE-2020-14181, CVE-2019-3403, CVE-2019-8449...)

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