CVE-2020-5643
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 · uneditedImproper input validation vulnerability in Cybozu Garoon 5.0.0 to 5.0.2 allows a remote authenticated attacker to delete some data of the bulletin board via unspecified vector.
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 confidenceImproper input validation in Cybozu Garoon versions 5.0.0 to 5.0.2 allows authenticated remote attackers to delete bulletin board data through unspecified vectors. The vulnerability stems from insufficient validation of user input in the bulletin board functionality.
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>= 5.0.0, <= 5.0.2CVSS 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
- None
- Integrity
- High
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/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 installationCheck for Garoon installation by looking for the product in your system inventory, or access the application login page and check the footer or about section for the version numberAffected if Cybozu Garoon is installed and the version displays as 5.0.0, 5.0.1, or 5.0.2
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Confirm exact version numberAccess the Garoon system administration console, navigate to the version or system information page, or check the install directory for a version file. Compare the displayed version against the affected range 5.0.0 to 5.0.2Affected if The installed version falls within >= 5.0.0 and <= 5.0.2
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Verify bulletin board module is accessibleCheck if the bulletin board (BBS) module is enabled in Garoon by navigating to System Administration > Application Settings > Bulletin Board, or reviewing the active modules in the system configurationAffected if The bulletin board module is enabled and accessible to users
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Check user authentication configurationReview the authentication settings in Garoon to confirm user accounts exist and can access the bulletin board functionality. Verify that unauthenticated access is not possible by confirming login is required for bulletin board featuresAffected if Authenticated users have access to the bulletin board functionality
Your environment is affected if Cybozu Garoon version 5.0.0, 5.0.1, or 5.0.2 is installed AND the bulletin board module is enabled with authenticated user access.
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 vendor patches or update to a fixed version. Ensure proper authentication controls are in place and review input handling in the bulletin board module.
- Consultation4.0 h
- Implementation8.0 h
- Testing4.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $5,120.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2020-5643 — 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-2020-5643 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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- 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
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