CVE-2018-8912
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.Note in Synology Note Station before 2.5.1-0844 allows remote authenticated users to inject arbitrary web script or HTML via the commit_msg 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 confidenceAuthenticated cross-site scripting (XSS) vulnerability in Synology Note Station's SYNO.NoteStation.Note component allows remote attackers to inject arbitrary JavaScript or HTML via the commit_msg parameter before version 2.5.1-0844.
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< 2.5.1-0844CVSS 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:3.0/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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Verify Synology Note Station is installedCheck if Note Station package is installed on the Synology NAS via Package Center or by inspecting the DSM package management system.Affected if Note Station is not installed, the system is not affected by this specific vulnerability.
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Determine installed Note Station versionAccess Synology Package Center, locate Note Station, and record the installed version number. Alternatively, query the Synology package manager via command line if SSH access is available.Affected if Version number is below 2.5.1-0844, indicating vulnerability to the reported XSS flaw.
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Confirm Note Station Note component is accessibleLog into DSM and verify that the Note Station application is accessible to at least one user account. The vulnerability requires authenticated access to the SYNO.NoteStation.Note component.Affected if No user accounts have access to Note Station, exploitation is not possible even on vulnerable versions.
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Inspect commit_msg parameter usageIf Note Station is in use, review any integrations or scripts that submit data to the Note Station API, specifically looking for usage of the commit_msg parameter in requests to the SYNO.NoteStation.Note endpoint.Affected if The commit_msg parameter is being used in API calls without sanitization, confirming the attack surface exists.
A Synology NAS running Note Station version 2.5.1-0844 or higher is not affected; versions below 2.5.1-0844 with Note Station accessible to authenticated users are vulnerable to XSS via the commit_msg parameter.
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 data2.5.1-0844
Upgrade Synology Note Station to version 2.5.1-0844 or later to patch the vulnerable input field, and validate that user-supplied content in the commit_msg parameter is properly sanitized before rendering.
- Consultation1.0 h
- Implementation2.0 h
- Testing2.0 h
- Review / QA1.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2018-8912 — 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-2018-8912 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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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