NifiApplication · Apache
CVE-2018-17193
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 · uneditedThe message-page.jsp error page used the value of the HTTP request header X-ProxyContextPath without sanitization, resulting in a reflected XSS attack. Mitigation: The fix to correctly parse and sanitize the request attribute value was applied on the Apache NiFi 1.8.0 release. Users running a prior 1.x release should upgrade to the appropriate release.
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 confidenceA reflected cross-site scripting (XSS) vulnerability exists in Apache NiFi's message-page.jsp error page. The application uses the value from the HTTP request header X-ProxyContextPath without proper sanitization, allowing an attacker to inject malicious scripts that get reflected back to the user in the error page response.
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
NifiApplication
>= 1.0.0, <= 1.7.1CVSS 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 installed NiFi versionCheck the NiFi version by reviewing the release notes file, the nifi.properties configuration file, or the login page footer which typically displays the version numberAffected if The installed version falls within >= 1.0.0 and <= 1.7.1
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Verify message-page.jsp is accessibleAttempt to access the error page endpoint - typically at /nifi/message-page.jsp or /nifi-api/message-page.jsp on the NiFi serverAffected if The error page endpoint responds without authentication or is accessible through a proxy configuration that exposes it
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Test X-ProxyContextPath header reflectionSend an HTTP request to any NiFi endpoint with a crafted X-ProxyContextPath header containing a test script tag such as <script>alert(1)</script> and observe if this value is reflected in the responseAffected if The value from the X-ProxyContextPath header is reflected back in the response without encoding or sanitization, causing the script tag to execute in the browser
A user is affected if their installed NiFi version is between 1.0.0 and 1.7.1 and the X-ProxyContextPath header value is reflected without sanitization in the error page response.
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 dataUpgrade to Apache NiFi 1.8.0 or later, which contains the fix to properly parse and sanitize the request attribute value. Organizations running prior 1.x releases should prioritize this upgrade.
Fix this in Nifi
Scoped from the published advisory
- Consultation2.0 h
- Implementation3.0 h
- Testing2.0 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 $2,272.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2018-17193 — 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-2018-17193 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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- Version or environment caveats, and links to real fixes
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