CVE-2019-11827
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 SYNO.NoteStation.Shard in Synology Note Station before 2.5.3-0863 allows remote attackers to inject arbitrary web script or HTML via the object_id parameter.
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 Synology Note Station's SYNO.NoteStation.Shard component allows remote attackers to inject arbitrary JavaScript or HTML via the object_id parameter in versions prior to 2.5.3-0863.
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< 2.5.3-0863CVSS 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 Note Station is installedLog into Synology DSM and check the installed package list, or run 'sudo synopkg list' from the command line to see installed packages.Affected if Note Station does not appear in the installed packages list.
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Identify installed Note Station versionIn DSM, go to Package Center > Note Station > right-click > Details, or use command line: 'sudo synopkg getitembypkgname NoteStation' to retrieve the version information.Affected if Unable to retrieve version information for Note Station.
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Compare version against vulnerable rangeCompare your installed version to the affected range: versions prior to 2.5.3-0863. If the installed version string is less than 2.5.3-0863 (for example, 2.5.2-xxxx or 2.4.x), you are in the affected range.Affected if Installed version is a release prior to 2.5.3-0863.
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Verify Note Station web interface is accessibleAccess Note Station by navigating to your Synology's IP/hostname with the Note Station path (typically /note/), or confirm the SYNO.NoteStation.Shard API endpoint is responding.Affected if Note Station web interface is not accessible or not enabled.
If Synology Note Station is installed with a version lower than 2.5.3-0863 and the web interface is accessible, the environment is affected by this XSS vulnerability.
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 data2.5.3-0863
Upgrade Note Station to version 2.5.3-0863 or later to patch the vulnerability. Alternatively, implement input validation/sanitization on the object_id parameter or deploy a WAF rule to filter malicious payloads.
- Consultation2.0 h
- Implementation1.0 h
- Testing2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2019-11827 — 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-2019-11827 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
- No spam, self-promotion, credentials, or personal data