CVE-2019-8449

MEDIUMNVD 5.35.3—Elevated

5.3

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 v3: 5.3
EG Score: 5.3(medium)
EPSS: 98.7%
KEV: Not listed

Published

September 11, 2019

Last Modified

November 21, 2024

References (4)

security@atlassianhttp://packetstormsecurity.com/files/156172/Jira-8.3.4-Information-Disclosure.html
security@atlassianhttps://jira.atlassian.com/browse/JRASERVER-69796
af854a3a-2127-422b-91ae-364da2661108http://packetstormsecurity.com/files/156172/Jira-8.3.4-Information-Disclosure.html
af854a3a-2127-422b-91ae-364da2661108https://jira.atlassian.com/browse/JRASERVER-69796

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 5× in last 7d / 10× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-01 13:50 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-05-31 00:14 UTCepss_batch
2026-05-31 00:14 UTCepss_batch
2026-05-29 13:42 UTCepss_batch
2026-05-27 14:43 UTCEG score recompute
2026-05-27 14:43 UTCGHSA enrichment
2026-05-27 13:39 UTCepss_batch
2026-05-27 13:38 UTCepss_batch
2026-05-24 16:47 UTCepss_batch

Publicly available exploits

(4 references)

Working exploit code is in the public domain (2 GitHub PoCs) (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

GitHub PoCr0lh/CVE-2019-8449
First seen Feb 14, 2020
User Enumeration Proof Of Concept Exploit for CVE-2019-8449
Open source ↗
Exploit-DBEDB-47990
First seen Feb 3, 2020
Jira 8.3.4 - Information Disclosure (Username Enumeration)
Open source ↗
GitHub PoCmufeedvh/CVE-2019-8449
First seen Feb 2, 2020
CVE-2019-8449 Exploit for Jira v2.1 - v8.3.4
Open source ↗
Nucleihttp/cves/2019/CVE-2019-8449.yaml
First seen Jan 1, 2019
Jira <8.4.0 - Information Disclosure
Open source ↗

Frequently asked(5)

What is CVE-2019-8449?

CVE-2019-8449 is a medium vulnerability published on September 11, 2019. The /rest/api/latest/groupuserpicker resource in Jira before version 8.4.0 allows remote attackers to enumerate usernames via an information disclosure vulnerability.

When was CVE-2019-8449 disclosed?

CVE-2019-8449 was first published in the National Vulnerability Database on September 11, 2019, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2019-8449 actively exploited?

CVE-2019-8449 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 98.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2019-8449?

CVE-2019-8449 has a CVSS v3 base score of 5.3 (NVD).

How do I remediate CVE-2019-8449?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2019-8449, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2019-8449

📅 Published

🔄 Last Modified

🔗 References (4)

Weakness Classification(2)

Data Freshness Timeline

Publicly available exploits

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2019-8449?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (4)

Frequently asked(5)

Related CVEs(same CWE)