MEDIUMPOC
CVE-2019-8449
CWE-306Published: September 11, 2019· Updated: Jun 17, 2026
5.3
CVSS v3.1
Official Description
The /rest/api/latest/groupuserpicker resource in Jira before version 8.4.0 allows remote attackers to enumerate usernames via an information disclosure vulnerability.
Technical Analysis
CVE-2019-8449 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.
A proof-of-concept (PoC) exploit exists for CVE-2019-8449. While not yet confirmed in active campaigns, the availability of PoC code increases exploitation risk substantially.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityLow
IntegrityNone
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Affected Vendors & Products
Atlassian1 product(s)
jira
Source: NVD CPE · 1 total CPE entries
Exploit & PoC Resources
POC AVAILABLEProof-of-concept code exists
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.
Official Patches & Advisories
All References (4)
→
http://packetstormsecurity.com/files/156172/Jira-8.3.4-Information-Disclosure.htmlExploit · Third Party Advisory · VDB Entry
→
https://jira.atlassian.com/browse/JRASERVER-69796Issue Tracking · Vendor Advisory
→
http://packetstormsecurity.com/files/156172/Jira-8.3.4-Information-Disclosure.htmlExploit · Third Party Advisory · VDB Entry
→
https://jira.atlassian.com/browse/JRASERVER-69796Issue Tracking · Vendor Advisory
Quick Facts
CVE IDCVE-2019-8449
CVSS Score5.3 / 10
SeverityMEDIUM
WeaknessCWE-306
CISA KEVNo
ExploitPOC
Affected1 vendor(s)
PublishedSep 11, 2019
Related CVEs (CWE-306)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2019-8449 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.