Security readout for executives and security teams
Plain-English summary
CVE-2020-4023 is a cross-site scripting issue in Atlassian Fisheye and Crucible before 4.8.2. A remote attacker could inject HTML or JavaScript through the review coverage resource, potentially affecting users who view manipulated content.
Executive priority
Treat as a focused remediation item for Atlassian development tooling. It is not documented as actively exploited, but exposed vulnerable instances could create user-session and trust risks.
Technical view
The vulnerability is XSS in the review coverage resource, specifically through the committerFilter parameter. The public bundle names Atlassian Fisheye and Crucible before version 4.8.2 as affected. No CVSS score, CWE, authentication requirement, or exploit detail is provided.
Likely exposure
Exposure is limited to organizations running Atlassian Fisheye or Crucible below 4.8.2, especially instances reachable by untrusted users or the internet.
Exploitation context
The source bundle does not show CISA KEV listing or active exploitation evidence. It only states remote attackers could inject arbitrary HTML or JavaScript.
Researcher notes
Evidence is sparse: no CVSS, CWE, exploit status, or detailed affected-version matrix is provided. The strongest facts are the affected products, pre-4.8.2 version boundary, XSS class, and committerFilter vector.
Mitigation direction
- Upgrade Fisheye and Crucible to version 4.8.2 or later.
- Review Atlassian FE-7298 and CRUC-8482 for vendor-specific guidance.
- Restrict access to Fisheye and Crucible while patching.
- Prioritize internet-facing or broadly accessible instances first.
Validation and detection
- Inventory all Fisheye and Crucible deployments.
- Confirm each instance is version 4.8.2 or later.
- Check whether vulnerable instances are internet-accessible.
- Review logs for unusual review coverage requests involving committerFilter.
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-2020-4023 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-7298CVE reference · x_refsource_MISC
- https://jira.atlassian.com/browse/CRUC-8482CVE 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.