CVE-2018-0711
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 QNAP QTS 4.3.3 build 20180126, QTS 4.3.4 build 20180315, and their earlier versions could allow remote attackers to inject arbitrary web script or HTML.
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 confidenceCross-site scripting (XSS) vulnerability in QNAP QTS web interface affecting versions 4.3.3 (build 20180126), 4.3.4 (build 20180315), and earlier versions. The flaw allows remote attackers to inject arbitrary web script or HTML via unsanitized input parameters in the QTS administrative interface.
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= 4.3.3.0514= 4.3.3.0546= 4.3.3.0570= 4.3.4.0516= 4.3.4.0526= 4.3.4.0551= 4.3.4.0557= 4.3.4.0561= 4.3.4.0569= 4.3.4.0593= 4.3.4.0597= 4.3.4.0604CVSS 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
- None
- User interaction
- Required
- Scope
- Changed
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
CVSS:3.0/AV:N/AC:L/PR:N/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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Identify QTS firmware versionLog into the QNAP QTS web interface and navigate to Control Panel > System > Firmware Update, or view the version displayed on the main dashboard. The version number in the format 4.3.3.xxxx or 4.3.4.xxxx is displayed.Affected if The installed version matches 4.3.3.0514, 4.3.3.0546, 4.3.3.0570, 4.3.4.0516, 4.3.4.0526, 4.3.4.0551, 4.3.4.0557, 4.3.4.0561, 4.3.4.0569, 4.3.4.0593, 4.3.4.0597, 4.3.4.0604, or is earlier than 4.3.3.0514.
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Confirm web administration interface is enabledAccess the QNAP admin login page (port 8080 or 443 by default) of your NAS. If a login page loads, the web interface is enabled.Affected if The QTS web administration interface is accessible and operational.
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Verify SSH or console access to run version commandEnable SSH in Control Panel > Network Services > Telnet/SSH and connect via terminal. Run the command: getsysinfo sysfirmver to retrieve the exact firmware build number.Affected if The command output returns a version number that falls within the affected build ranges.
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Check QTS build number via help functionIn the QTS web interface, click the Help icon or menu, then select About. The build number and full version string are displayed.Affected if The displayed build number matches one listed in the affected versions or is lower.
A user is affected if their QNAP QTS firmware version is 4.3.3.0514 through 4.3.4.0604, any earlier 4.3.x version, or unspecified earlier versions, and the QTS web administration interface is enabled.
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 dataUpdate QNAP QTS to the latest patched version that addresses CVE-2018-0711. As an interim measure, disable the QTS web administration interface if not required, or restrict access to trusted IP addresses only.
- Consultation2.0 h
- Implementation4.0 h
- Testing3.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2018-0711 — 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-2018-0711 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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