Affected versions of Atlassian Jira Server and Data Center allow authenticated remote…
Priority LOW 23Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- Low · None · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA.
Summary
Affected versions of Atlassian Jira Server and Data Center allow authenticated remote attackers to enumerate the keys of private Jira projects via an Information Disclosure vulnerability in the /rest/api/latest/projectvalidate/key endpoint. The affected versions are before version 8.5.18, from version 8.6.0 before 8.13.10, and from version 8.14.0 before 8.18.2.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01661 76th percentileScored 2026-11-07
Fix Fixed Jira Server (Atlassian): 8.5.18, 8.13.10, 8.18.2Jira Data Center (Atlassian): 8.5.18, 8.13.10, 8.18.2
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Atlassian | Jira Server | before 8.5.18; 8.6.0 and later; before 8.13.10; 8.14.0 and later; before 8.18.2 | 8.5.18, 8.13.10, 8.18.2 | Patch available | CNA |
| Atlassian | Jira Data Center | before 8.5.18; 8.6.0 and later; before 8.13.10; 8.14.0 and later; before 8.18.2 | 8.5.18, 8.13.10, 8.18.2 | Patch available | CNA |
- Jira Server VendorAtlassian Affected before 8.5.18; 8.6.0 and later; before 8.13.10; 8.14.0 and later; before 8.18.2 Fixed in 8.5.18, 8.13.10, 8.18.2 Patch available CNA
- Jira Data Center VendorAtlassian Affected before 8.5.18; 8.6.0 and later; before 8.13.10; 8.14.0 and later; before 8.18.2 Fixed in 8.5.18, 8.13.10, 8.18.2 Patch available CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:atlassian:data_center:*:*:*:*:*:*:*:* | before 8.5.18 | Vulnerable | Atlassian |
| cpe:2.3:a:atlassian:jira:*:*:*:*:*:*:*:* | before 8.5.18 | Vulnerable | Atlassian |
| cpe:2.3:a:atlassian:jira_data_center:*:*:*:*:*:*:*:* | 8.6.0 to before 8.13.10; 8.14.0 to before 8.18.2 | Vulnerable | Atlassian |
| cpe:2.3:a:atlassian:jira_server:*:*:*:*:*:*:*:* | 8.6.0 to before 8.13.10; 8.14.0 to before 8.18.2 | Vulnerable | Atlassian |
- cpe:2.3:a:atlassian:data_center:*:*:*:*:*:*:*:* Versions before 8.5.18 Vulnerable ·Atlassian
- cpe:2.3:a:atlassian:jira:*:*:*:*:*:*:*:* Versions before 8.5.18 Vulnerable ·Atlassian
- cpe:2.3:a:atlassian:jira_data_center:*:*:*:*:*:*:*:* Versions 8.6.0 to before 8.13.10; 8.14.0 to before 8.18.2 Vulnerable ·Atlassian
- cpe:2.3:a:atlassian:jira_server:*:*:*:*:*:*:*:* Versions 8.6.0 to before 8.13.10; 8.14.0 to before 8.18.2 Vulnerable ·Atlassian
Remediation
- Fix · CNA Jira Server (Atlassian) Fixed in 8.5.18, 8.13.10, 8.18.2
- Fix · CNA Jira Data Center (Atlassian) Fixed in 8.5.18, 8.13.10, 8.18.2
Timeline
- 2026-10-02 Threatist record created from CVE-2021-39121
- 2026-10-03 Alias added: GHSA-r34f-76fq-39vg
References
More Atlassian Data Center vulnerabilities
- TI-2020-18587 Incorrect authorization in Atlassian Jira Server CVSS 3.1MEDIUM 5.3
- TI-2020-11107 Information disclosure in Atlassian Jira Server CVSS 3.1MEDIUM 5.3
- TI-2021-16503 Insufficient session expiration in Atlassian Jira Server CVSS 3.1HIGH 7.5
- TI-2017-13320 Code injection in Atlassian Jira Server CVSS 3.1HIGH 8.8
- TI-2020-17687 Path traversal in Atlassian Jira Server CVSS 3.1MEDIUM 5.3
- TI-2021-16512 Affected versions of Atlassian Jira Server and Data Center allow unauthenticated remote… CVSS 3.1HIGH 7.5
Sources
- CVE-2021-39121 · CVE Program
- CVE-2021-39121 · NVD
- FIRST EPSS
- GHSA-r34f-76fq-39vg · GitHub Advisory Database · CC BY 4.0
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