CVE-2021-20626
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 access control vulnerability in Workflow of Cybozu Office 10.0.0 to 10.8.4 allows authenticated attackers to bypass access restriction and alter the data of Workflow 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 · high confidenceImproper access control vulnerability in the Workflow component of Cybozu Office versions 10.0.0 through 10.8.4 allows authenticated users to bypass intended access restrictions and modify Workflow data they should not have permission to alter.
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>= 10.0.0, <= 10.8.4CVSS 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 Office installationLocate the Cybozu Office installation directory or check system inventory for Cybozu Office softwareAffected if Cybozu Office is installed on the system
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Check installed versionUse the product's built-in version check (typically via administration panel, about page, or versioninfo command) to determine the exact installed version numberAffected if The installed version falls within the range 10.0.0 to 10.8.4 (inclusive)
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Verify Workflow component is in useCheck if the Workflow module/component is enabled and actively used in the Cybozu Office installation (via administration settings or configuration inspection)Affected if Workflow is enabled and users have access to submit or manage workflow items
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Confirm access control configurationReview user permissions settings within the Workflow component to verify that role-based access controls are properly configuredAffected if Authenticated users can access workflow data that should be restricted based on their assigned permissions
A user is affected if Cybozu Office version 10.0.0 through 10.8.4 is installed and the Workflow component is enabled, regardless of access control configuration, because the vulnerability allows bypass of those controls.
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 or upgrade Cybozu Office to a version beyond 10.8.4. Since this is an access control bypass in a vendor product, no configuration workaround exists; the official vendor fix is required.
- Consultation2.0 h
- Implementation2.0 h
- Testing3.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-20626 — 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-2021-20626 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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