CVE-2019-8449

mediumpriority · attend · 61OT risk · highEPSS 0.848 · 100 %ileexploit · PoCEUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

3 exploits · PoC

Likely / severe?

84.8% (100th) EPSS

CVSS 5 · medium

Is it mine?

2 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · nvd

EPSS · scored 2026-10-26

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

cvss

Technical severity, 0–10. One row per scoring source.

5.3

010

base score 0–10 · higher = more severe · hover a vector to decode

v2.05mediumAV:N/AC:L/Au:N/C:P/I:N/A:Nprimary · NVD / NIST USexploitability 10 · impact 2.9

v3.15.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:Nprimary · NVD / NIST USexploitability 3.9 · impact 1.4

v3.15.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:Hsecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-306USprimary

exploits (3)

Public proof-of-concept and weaponised exploit code.

EDB-47990Jira 8.3.4 - Information Disclosure (Username Enumeration)PoC · exploit_db
mufeedvh/CVE-2019-8449CVE-2019-8449 Exploit for Jira v2.1 - v8.3.4PoC · poc_in_github
r0lh/CVE-2019-8449User Enumeration Proof Of Concept Exploit for CVE-2019-8449PoC · poc_in_github

affected products (2)

Products and version ranges known to be affected.

Atlassian Jiraunspecified → 8.4.0enisa_euvdEU
atlassian jira< 8.4.0nvdUScpe:2.3:a:atlassian:jira:*:*:*:*:*:*:*:*

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd NVD CVE.org MITRE

published 2019-09-11modified 2026-06-17

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references (8)

External citations — patches, advisories, analysis.

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