CVE-2020-5580
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedCybozu Garoon 4.0.0 to 5.0.1 allows remote authenticated attackers to bypass access restriction to view and/or alter Single sign-on settings via unspecified vectors.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · moderate confidenceCybozu Garoon versions 4.0.0 to 5.0.1 contain a broken access control vulnerability allowing authenticated users to bypass intended restrictions and access Single Sign-On (SSO) settings they should not have permission to view or modify. This could enable attackers to expose SSO configuration details or alter authentication settings to intercept credentials.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data>= 4.0.0, <= 5.0.1CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Identify Cybozu Garoon installationLocate the Cybozu Garoon installation on your server. Check for the Garoon installation directory or identify the running web application service.Affected if Cybozu Garoon is installed on the system
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Determine installed Garoon versionAccess the Garoon system information page via the administrative interface, typically found in the system settings or help section. This displays the current product version.Affected if The installed version is between 4.0.0 and 5.0.1 inclusive
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Verify SSO is configuredCheck whether Single Sign-On (SSO) functionality is enabled or configured in your Garoon environment. Access the authentication or SSO settings within the administrative console.Affected if SSO is enabled or configured in the Garoon environment (the vulnerability allows unauthorized access to SSO settings regardless of whether SSO is active, but impact is higher if SSO is in use)
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Audit SSO configuration for unauthorized changesReview the current SSO configuration settings including identity provider details, authentication endpoints, and certificate settings. Compare against known-good baseline configurations if available.Affected if Any SSO settings exist that were not intentionally configured by administrators or do not match expected values
You are affected if Cybozu Garoon version 4.0.0 through 5.0.1 is installed, regardless of SSO configuration status, as the access control bypass allows any authenticated user to access SSO settings.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataApply the vendor patch/upgrade to Cybozu Garoon beyond version 5.0.1. Review SSO configuration for unauthorized changes and audit access logs for suspicious activity related to SSO settings.
- Consultation2.0 h
- Implementation4.0 h
- Testing6.0 h
- Review / QA3.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $4,096.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2020-5580 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2020-5580 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
- No spam, self-promotion, credentials, or personal data