CVE-2025-33031
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 · uneditedAn improper certificate validation vulnerability has been reported to affect File Station 5. If a remote attacker gains a user account, they can then exploit the vulnerability to compromise the security of the system. We have already fixed the vulnerability in the following version: File Station 5 5.5.6.4847 and later
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 · moderate confidenceImproper certificate validation vulnerability in QNAP File Station 5 allows a remote attacker who has already obtained a valid user account to exploit weak certificate validation and compromise system security.
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>= 5.5.6.4691, < 5.5.6.4847CVSS 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:3.1/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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Confirm File Station 5 is installedLog into QTS and navigate to App Center, or run 'qpkg -i | grep -i file station' via SSH to list installed File Station packagesAffected if File Station 5 is present on the system
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Locate the installed version of File Station 5In QTS, go to App Center > File Station > Settings > About, or check version via command line if availableAffected if Unable to determine version number from the system
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Compare your version against the affected rangeNote the installed version number and compare to the vulnerable range: 5.5.6.4691 through 5.5.6.4846Affected if Installed version is 5.5.6.4691 or higher but lower than 5.5.6.4847
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Verify if remote user access is enabledCheck File Station access settings in QTS under Control Panel > Application > Web Server, or determine if the device is exposed to network/authenticated usersAffected if Remote access or user authentication is enabled and the File Station version falls within the vulnerable range
You are affected if File Station 5 is installed with a version between 5.5.6.4691 and 5.5.6.4846 inclusive, and remote user accounts can access the system.
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.
dbcve · scoped5.5.6.4847
Update File Station 5 to version 5.5.6.4847 or later to remediate the improper certificate validation vulnerability.
File Station 5 version 5.5.6.4847 or later
- Check current File Station version by navigating to File Station > Settings > General in the QNAP interface
- Download and install File Station 5 version 5.5.6.4847 or later from QNAP's download center
- Restart the File Station service or reboot the NAS to ensure the update takes effect
- Verify the new version is installed by checking File Station > Settings > General
Generated from the published advisory — verify against the referenced sources before acting.
- 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-2025-33031 — 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-2025-33031 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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