CVE-2017-7636
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 NAS application Proxy Server through version 1.2.0 allows 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 NAS Proxy Server application (versions up to 1.2.0) allows remote attackers to inject arbitrary web script or HTML via unsanitized input fields in the application's web 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< 1.3.0CVSS 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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Verify QNAP NAS Proxy Server is installedAccess QNAP NAS Admin Console (usually port 8080 or 443), navigate to App Center or Control Panel > Applications, and check if Proxy Server appears in the installed applications list. Alternatively, check via QNAP CLI: run 'ls /share/CACHEDEV1_DATA/.qpkg/ProxyServer' or check QNAP package manager.Affected if Proxy Server application is not found in the installed applications list, then not affected.
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Identify installed Proxy Server versionIn QNAP Admin Console, go to App Center > Proxy Server > Settings, or right-click Proxy Server in App Center and select 'Information' to view the version number. The version is typically displayed as a three-number release (e.g., 1.2.0).Affected if Version shown is 1.2.0 or below (any version less than 1.3.0), then vulnerable.
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Confirm Proxy Server web interface is accessibleAttempt to access the Proxy Server web interface directly via browser using the NAS IP address on the configured port (commonly /proxy or the port assigned during setup). Verify the page loads successfully.Affected if The web interface is accessible and responds, then the XSS attack surface is present.
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Check if Proxy Server is runningIn QNAP Admin Console, navigate to App Center > Proxy Server and verify the application status shows as 'Running', or via SSH run: 'ps | grep -i proxy' on the NAS.Affected if Proxy Server is installed and currently running, then the vulnerable code is active.
Affected if QNAP NAS Proxy Server is installed and running with any version below 1.3.0, and its web interface is accessible.
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 data1.3.0
Update Proxy Server to a patched version if available, or disable the application until a fix is released. If immediate remediation is needed, implement input validation and output encoding for all user-supplied data.
- Consultation2.0 h
- Implementation2.0 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-2017-7636 — 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-2017-7636 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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