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Drive ServerApplication · Synology

CVE-2018-8910

MEDIUM · 5.4 CVSS v3.0 Published 2018-05-10
Fix available
A fix is available. Upgrade to 1.0.1-10253 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 Drive before 1.0.1-10253 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

A stored cross-site scripting (XSS) vulnerability exists in the Attachment Preview functionality of Synology Drive. An authenticated user can upload a malicious attachment containing embedded JavaScript or HTML that executes when other users view the preview, allowing session hijacking or data theft.

MitigationUpgrade Synology Drive to version 1.0.1-10253 or later which includes proper input sanitization and output encoding for attachment previews.

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
Drive ServerApplication
Affected:< 1.0.1-10253

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. Confirm Synology Drive Server installation
    Access Synology DSM Control Panel > Package Center and verify if Synology Drive Server package is installed
    Affected if Synology Drive Server is not installed, the vulnerability does not apply
  2. Identify installed Synology Drive Server version
    In Package Center, locate Synology Drive Server and note the installed version number displayed in the Version column
    Affected if Unable to determine version - further investigation needed
  3. Compare version against affected range
    Compare your installed version number to the vulnerable threshold: version must be less than 1.0.1-10253 to be affected
    Affected if Installed version is 1.0.1-10253 or higher - not affected by this CVE
  4. Verify Attachment Preview feature usage
    Check if users have access to the file preview feature in Synology Drive client or web interface - the vulnerability requires this feature to be accessible
    Affected if Attachment Preview is disabled or not accessible to users - exploit requires this feature to be active

Environment is affected if Synology Drive Server is installed with a version lower than 1.0.1-10253 and users have access to the Attachment Preview functionality.

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 1.0.1-10253 or later
Fixed in 1.0.1-10253
Interim mitigation

Upgrade Synology Drive to version 1.0.1-10253 or later which includes proper input sanitization and output encoding for attachment previews.

Fix this in Drive Server Scoped from the published advisory
  • Consultation3.0 h
  • Implementation6.0 h
  • Testing4.0 h
  • Review / QA2.0 h
15.0 hours of engineering $2,640
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $4,224.

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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-2018-8910 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