CVE-2018-0719
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 NAS devices of QNAP Systems Inc. QTS allows attackers to inject javascript. This issue affects: QNAP Systems Inc. QTS version 4.2.6 and prior versions on build 20180711; version 4.3.3 and prior versions on build 20180725; version 4.3.4 and prior versions on build 20180710.
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 confidenceCross-site scripting (XSS) vulnerability in QNAP QTS web interface allows attackers to inject malicious JavaScript through unsanitized input. This is a stored XSS affecting the NAS management interface across multiple QTS version branches.
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= 4.2.6= 4.3.3= 4.3.4CVSS 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
- Unchanged
- Confidentiality
- Low
- Integrity
- Low
- Availability
- Low
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L
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.
-
Identify QTS firmware versionLog into the QNAP NAS admin interface and navigate to Control Panel → System Settings → Firmware Update, or run `cat /etc/version` via SSH to retrieve the installed firmware version.Affected if The displayed version matches 4.2.6, 4.3.3, or 4.3.4 exactly, or falls within these specific branch releases without later security patches.
-
Confirm web interface is enabledVerify that the QTS web administration interface (port 8080 or 443) is accessible and not disabled. Check via Control Panel → System Settings → General Settings → Web Server.Affected if The web interface is enabled and exposed, providing the attack surface for the stored XSS to be triggered.
-
Check build date of firmwareIn the Firmware Update section, view the build number or build date of the installed QTS version. This date indicates whether the security patches applied.Affected if The build date is on or before July 11, 2018 for QTS 4.2.x, on or before July 25, 2018 for QTS 4.3.3, or on or before July 10, 2018 for QTS 4.3.4.
-
Review recent admin logs for XSS attemptsAccess QTS Log Center and review admin login entries and system logs around the time of potential compromise for suspicious script tags or unexpected JavaScript references.Affected if Unusual script tags, encoded characters, or unexpected JavaScript executions appear in logs, indicating possible exploitation attempts.
You are affected if your QTS firmware version is exactly 4.2.6, 4.3.3, or 4.3.4 (or falls within these branches without later patches) and the web management 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 QTS firmware to a version beyond the affected builds (post-20180711 for 4.2.x, post-20180725 for 4.3.3, post-20180710 for 4.3.4). If patching is not immediately possible, restrict web interface access to trusted networks and implement WAF rules to filter XSS payloads.
- Consultation2.0 h
- Implementation1.0 h
- Testing3.0 h
- Review / QA1.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $1,936.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2018-0719 — 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-2018-0719 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
Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.
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.
- 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