Security readout for executives and security teams
Plain-English summary
Cybozu Garoon could let a logged-in user obtain Bulletin comments and Space data they should not be able to view. This is not described as unauthenticated compromise; the attacker needs valid access. The business concern is confidentiality leakage inside internal collaboration content.
Executive priority
Treat this as a confidentiality issue requiring timely remediation if Garoon is in use. It is less urgent than unauthenticated remote code execution, but sensitive internal discussions may be exposed to unauthorized logged-in users.
Technical view
Affected Cybozu Garoon 4.10.0 to 5.5.0 has improper input validation. A remote authenticated attacker can obtain Comment and Space data without the viewing privilege. The source bundle does not provide CVSS, CWE, exploit details, or a confirmed fixed version.
Likely exposure
Organizations running Cybozu Garoon versions 4.10.0 through 5.5.0 are potentially exposed, especially where many internal users have accounts but restricted Bulletin or Space permissions.
Exploitation context
The provided sources do not report active exploitation, public exploit availability, or KEV listing. Exploitation requires authentication, so risk is mainly from compromised accounts or insiders with lower privileges.
Researcher notes
The public bundle is sparse: it identifies affected versions and impact but lacks scoring, root-cause detail, and remediation text. Avoid assuming exploitability beyond authenticated unauthorized data access until vendor or JVN details are reviewed.
Mitigation direction
- Identify any Cybozu Garoon deployments and record their versions.
- Check Cybozu and JVN advisories for fixed versions or vendor-directed remediation.
- Upgrade or apply vendor guidance where affected versions are present.
- Limit Garoon access to trusted users while remediation is pending.
- Review sensitive Bulletin and Space content exposure assumptions.
Validation and detection
- Confirm whether Garoon version is between 4.10.0 and 5.5.0.
- Review Bulletin and Space permission boundaries for sensitive content.
- Use controlled test accounts to validate viewing restrictions defensively.
- Check access logs for unusual authenticated access to restricted collaboration data.
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-2021-20775 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://cs.cybozu.co.jp/2021/007206.htmlCVE reference · x_refsource_MISC
- https://jvn.jp/en/jp/JVN54794245/index.htmlCVE 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.