Security readout for executives and security teams
Plain-English summary
This issue can let a remote attacker list linked applications in Atlassian Navigator Links, including applications meant to be hidden or restricted. It is primarily an information exposure and authorization problem, not a confirmed code execution issue in the provided sources.
Executive priority
Treat this as a moderate-priority confidentiality issue. It may reveal internal application relationships that assist reconnaissance, but the provided sources do not support active exploitation or direct system compromise.
Technical view
CustomAppsRestResource list in Atlassian Navigator Links had an incorrect authorization check. Vulnerable versions before 3.3.23, 4.0.0 before 4.3.7, 5.0.0 before 5.0.1, and 5.1.0 before 5.1.1 could disclose all linked applications.
Likely exposure
Exposure is most likely where Atlassian Navigator Links is deployed in affected versions, including environments involving Fisheye or Crucible as reflected in the source bundle. Internet-facing or broadly accessible Atlassian services increase business relevance.
Exploitation context
The provided sources do not show CISA KEV listing, active exploitation, exploit maturity, or public weaponization. The described attacker outcome is enumeration of linked applications through an authorization weakness.
Researcher notes
No CVSS vector or CWE is supplied in the bundle. The affected data is application-link metadata, including hidden or restricted entries. Validate component presence carefully because the description centers on Navigator Links while affected products also list Crucible and Fisheye.
Mitigation direction
- Upgrade Navigator Links to 3.3.23, 4.3.7, 5.0.1, 5.1.1, or later as applicable.
- Review Atlassian FE-7299 and CRUC-8485 for product-specific guidance.
- Inventory Fisheye and Crucible deployments that include Navigator Links.
- Limit access to affected Atlassian services until patched where business operations allow.
- Review linked application visibility settings after upgrade.
Validation and detection
- Confirm installed Navigator Links versions are outside the vulnerable ranges.
- Test that hidden or restricted linked applications are not listed to unauthorized users.
- Check whether Fisheye or Crucible instances include the affected component.
- Review access paths to Atlassian services for unintended external exposure.
- Document the patch level and verification outcome for audit records.
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.
CVE-2020-4026 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/FE-7299CVE reference · x_refsource_MISC
- https://jira.atlassian.com/browse/CRUC-8485CVE 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.