CVE-2020-5568
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 · uneditedCross-site scripting vulnerability in Cybozu Garoon 4.6.0 to 5.0.0 allows remote attackers to inject arbitrary web script or HTML via the applications 'Messages' and 'Bulletin Board'.
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 confidenceCross-site scripting (XSS) vulnerability in Cybozu Garoon versions 4.6.0 through 5.0.0 allows remote attackers to inject malicious JavaScript or HTML into the Messages and Bulletin Board applications. The vulnerability is exploitable when users view crafted content, potentially allowing session hijacking or credential theft.
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>= 4.6.0, <= 5.0.0CVSS 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
- None
- User interaction
- Required
- Scope
- Changed
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/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.
-
Confirm Cybozu Garoon is installedIdentify if Cybozu Garoon is running in the environment by checking for the product's web interface, service processes, or installation directories. Look for garoon-related processes or the typical Garoon login portal (usually on ports 80/443 or custom ports).Affected if Cybozu Garoon software is present in the environment
-
Determine the installed Garoon versionAccess the Garoon system settings or administration panel. The version information is typically found in the System Administration > System Settings > Version Information section. Alternatively, check the install directory for version files or the Garoon log files which may contain version strings.Affected if The installed version falls within 4.6.0 through 5.0.0 inclusive
-
Verify Messages application is enabledLog into Garoon as an administrator and navigate to the application settings. Confirm whether the Messages application (typically found under the communication or workflow section) is currently active and accessible to users.Affected if Messages application is enabled and accessible to users in versions 4.6.0 to 5.0.0
-
Verify Bulletin Board application is enabledLog into Garoon as an administrator and navigate to the application settings. Confirm whether the Bulletin Board application (often labeled as 'Bulletin' or 'Board' in the portal settings) is currently active and accessible to users.Affected if Bulletin Board application is enabled and accessible to users in versions 4.6.0 to 5.0.0
-
Review web server logs for XSS indicatorsExamine the Garoon web server access logs and application logs for unusual request patterns containing script tags, javascript: URIs, or other XSS payloads in the Messages or Bulletin Board parameters. Look for entries with <script>, onerror=, onload=, or similar patterns.Affected if Logs show suspicious XSS payloads submitted to Messages or Bulletin Board functions
The environment is affected if Cybozu Garoon versions 4.6.0 through 5.0.0 are installed AND the Messages or Bulletin Board applications are enabled, exposing users to potential XSS attacks through crafted content.
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 dataUpgrade Cybozu Garoon to version 5.0.1 or later which contains the patched version, or apply vendor-supplied patches. Until patching is complete, disable or restrict access to the vulnerable Messages and Bulletin Board applications.
- Consultation3.0 h
- Implementation2.0 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 $3,072.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2020-5568 — 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-2020-5568 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
Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.
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