CVE-2019-11828
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 (XSS) vulnerability in Chart in Synology Office before 3.1.4-2771 allows remote authenticated users to inject arbitrary web script or HTML 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 confidenceCross-site scripting (XSS) vulnerability in the Chart component of Synology Office allows authenticated users to inject arbitrary web scripts or HTML via unspecified vectors. The vulnerability affects versions prior to 3.1.4-2771 and could allow attackers to execute malicious scripts in the context of other users viewing the affected charts.
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< 3.1.4-2771CVSS 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
- Required
- Scope
- Changed
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:L/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.
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Confirm Synology Office is installedAccess Synology DSM and navigate to Package Center to verify Synology Office package is installed, or use the command line to list installed packages via 'sudo synopkg list'Affected if Synology Office is not present on the system, the vulnerability does not apply
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Determine installed Synology Office versionIn Synology DSM Package Center, click on Synology Office and view the version information, or run 'sudo synopkg info SynologyOffice' to retrieve package details including version numberAffected if Unable to retrieve version information, assume potentially affected
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Compare version against vulnerable rangeCheck if the installed version is less than 3.1.4-2771. The version number is typically displayed in format such as '3.1.4-2771' or similarAffected if Installed version is lower than 3.1.4-2771, indicating the vulnerability is present
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Verify Chart component is accessibleLog into Synology Office as an authenticated user and confirm the Chart/ spreadsheet chart creation feature is available and functionalAffected if Chart component is not accessible or not used, exploitation vector may be limited but the vulnerable code still exists
A system is affected if Synology Office is installed with a version number lower than 3.1.4-2771 and the Chart component is accessible to users.
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 data3.1.4-2771
Update Synology Office to version 3.1.4-2771 or later to apply the patch. As a secondary measure, implement input validation and output encoding for user-supplied data in the Chart functionality.
- Consultation2.0 h
- Implementation2.0 h
- Testing3.0 h
- Review / QA1.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2019-11828 — 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-2019-11828 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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