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File StationApplication · Synology

CVE-2018-8923

MEDIUM · 5.4 CVSS v3.0 Published 2018-06-05
Fix available
A fix is available. Upgrade to 1.1.4-0122 or later.
See remediation →
58/100
Remediation priority · Elevated
Remotely reachable

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 · unedited
Cross-site scripting (XSS) vulnerability in Attachment Preview in Synology File Station before 1.1.4-0122 allows remote authenticated users to inject arbitrary web script or HTML via malicious attachments.

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 confidence

Cross-site scripting (XSS) vulnerability in Synology File Station's Attachment Preview feature allows authenticated users to inject malicious web scripts or HTML through specially crafted attachments. When other users preview these attachments, the injected code executes in their browsers.

MitigationUpgrade Synology File Station to version 1.1.4-0122 or later. Until then, consider disabling the Attachment Preview feature or implementing Content Security Policy headers to mitigate XSS execution.

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
File StationApplication
Affected:< 1.1.4-0122

CVSS 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 checks

Work through these to decide whether this CVE applies to you.

  1. Verify Synology File Station is installed
    Log into Synology DSM, open Package Center, and confirm if File Station package is listed as installed
    Affected if File Station is not installed on the Synology NAS
  2. Identify the installed File Station version
    In DSM Package Center, locate File Station in the installed package list and note the version number displayed
    Affected if Version number is lower than 1.1.4-0122
  3. Confirm the Attachment Preview feature is enabled
    In DSM, open File Station, go to Settings or Preferences, and locate the Attachment Preview or preview-related settings to verify if preview functionality is turned on
    Affected if Attachment Preview feature is enabled and version is below 1.1.4-0122

User is affected if Synology File Station is installed with version lower than 1.1.4-0122 and the Attachment Preview feature is enabled.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

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 data
Upgrade available Upgrade to 1.1.4-0122 or later
Fixed in 1.1.4-0122
Interim mitigation

Upgrade Synology File Station to version 1.1.4-0122 or later. Until then, consider disabling the Attachment Preview feature or implementing Content Security Policy headers to mitigate XSS execution.

Fix this in File Station Scoped from the published advisory
  • Consultation1.0 h
  • Implementation2.0 h
  • Testing2.0 h
  • Review / QA1.0 h
6.0 hours of engineering $1,040
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $1,664.

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2018-8923 in production — separate from our analysis above.

No notes yet

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What this is

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.

What belongs here
  • 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