Security readout for executives and security teams
Plain-English summary
This flaw lets an unauthenticated remote user check whether Jira usernames are valid. It does not describe direct account takeover, but it can support targeted phishing, credential stuffing, and password-guessing campaigns against self-managed Jira deployments.
Executive priority
Treat as a moderate identity-exposure issue. Prioritize internet-facing Jira instances because username discovery can improve follow-on attacks, even without direct system compromise.
Technical view
CVE-2020-36238 affects Jira Server and Data Center render REST resource /rest/api/1.0/render. A missing permissions check allows anonymous remote username validity determination. Affected ranges are before 8.5.13, 8.6.0 before 8.13.5, and 8.14.0 before 8.15.1.
Likely exposure
Exposure is likely where Jira Server or Data Center is reachable by untrusted users and runs an affected version. The source bundle does not identify Jira Cloud as affected.
Exploitation context
The provided sources support remote anonymous username enumeration. They do not provide evidence of active exploitation, weaponized public exploit activity, or CISA KEV listing.
Researcher notes
The public record provides affected version ranges and the vulnerable resource, but no CVSS vector or exploitation evidence in the supplied bundle. Analysis should avoid assuming broader impact beyond username validity disclosure.
Mitigation direction
- Upgrade Jira Server/Data Center to 8.5.13, 8.13.5, 8.15.1, or a later supported release.
- Check Atlassian guidance for version-specific upgrade and support constraints.
- Limit anonymous access and internet exposure for Jira where business requirements allow.
- Strengthen account protections such as MFA and lockout monitoring for Jira users.
Validation and detection
- Inventory Jira Server and Data Center versions across externally and internally reachable instances.
- Confirm affected versions are upgraded or scheduled for remediation.
- Review access logs for anonymous requests to the render REST resource and unusual account-discovery patterns.
- Verify anonymous users cannot infer username validity through the render REST resource.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-863: Authorization and privilege behavior lookup
Authorization weaknesses can support privilege escalation and valid-account review, depending on exploit path. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2020-36238 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://jira.atlassian.com/browse/JRASERVER-72249CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Incorrect Authorization
Incorrect Authorization represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.