CVE-2018-8926
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 · uneditedPermissive regular expression vulnerability in synophoto_dsm_user in Synology Photo Station before 6.8.5-3471 and before 6.3-2975 allows remote authenticated users to conduct privilege escalation attacks via the fullname 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 confidencePermissive regular expression vulnerability in Synology Photo Station's synophoto_dsm_user component allows authenticated users to escalate privileges via the fullname parameter.
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>= 6.3-2958, <= 6.3-2975>= 6.8.0-3456, < 6.8.5-3471CVSS 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
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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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Identify Photo Station versionAccess Synology Package Center and locate Photo Station, or run 'cat /var/packages/PhotoStation/info.json' on the NAS to view installed versionAffected if installed version falls within 6.3-2958 to 6.3-2975, or 6.8.0-3456 to 6.8.5-3470 (versions before 6.8.5-3471)
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Verify synophoto_dsm_user component existsCheck if the Photo Station web directory contains the synophoto_dsm_user CGI script, typically located at /webapi/synophoto_dsm_user.cgi or similar path under the Photo Station web rootAffected if the script is present and accessible via the Photo Station web interface
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Confirm user authentication contextDetermine if any user account is authenticated to Photo Station, as exploitation requires an authenticated sessionAffected if any user has an active Photo Station session or credentials to log in
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Review user privilege configurationInspect the user management configuration via Synology DSM or Photo Station admin panel to identify current privilege levelsAffected if users with standard Photo Station access exist who could potentially manipulate the fullname parameter to escalate privileges
Your environment is affected if Photo Station version is within the vulnerable ranges AND the synophoto_dsm_user component is accessible to authenticated users who could manipulate the fullname 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 data6.8.5-3471
Update Synology Photo Station to version 6.8.5-3471 or later (6.3-2975 or later for the 6.3 branch).
- Consultation1.0 h
- Implementation1.0 h
- Testing1.0 h
- Review / QA1.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2018-8926 — 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-2018-8926 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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