CVE-2018-16555
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 · uneditedA vulnerability has been identified in SCALANCE S602 (All versions < V4.0.1.1), SCALANCE S612 (All versions < V4.0.1.1), SCALANCE S623 (All versions < V4.0.1.1), SCALANCE S627-2M (All versions < V4.0.1.1). The integrated web server could allow Cross-Site Scripting (XSS) attacks if unsuspecting users are tricked into accessing a malicious link. User interaction is required for a successful exploitation. The user must be logged into the web interface in order for the exploitation to succeed. At the stage of publishing this security advisory no public exploitation is known.
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 confidenceThis is a stored Cross-Site Scripting (XSS) vulnerability in the web-based management interface of Siemens SCALANCE S602, S612, S623, and S627-2M industrial network security appliances. An authenticated attacker can inject malicious JavaScript code through the web interface that executes in the browsers of other logged-in users who access the malicious content.
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< v4.0.1.1< 4.0.1.1< 4.0.1.1< 4.0.1.1CVSS 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
- Low
- User interaction
- Required
- Scope
- Changed
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
CVSS:3.0/AV:N/AC:L/PR:L/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 SCALANCE device modelAccess the device web interface or check network inventory/CLI to confirm the exact model: S602, S612, S623, or S627-2MAffected if Device model is one of S602, S612, S623, or S627-2M AND firmware version is below 4.0.1.1
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Check installed firmware versionLog into the web management interface and navigate to System > Firmware or use CLI command 'show firmware version' to retrieve the current firmware versionAffected if Firmware version is less than 4.0.1.1 (for example, v3.x.x.x or v4.0.0.x)
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Verify web management interface is enabledCheck device configuration via CLI or web interface to confirm the HTTP/HTTPS management interface is activeAffected if Web management interface is enabled on the affected device with vulnerable firmware
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Inspect web interface for suspicious stored contentReview any user-configurable fields in the web interface (such as device names, descriptions, or custom settings) for unexpected script tags or encoded JavaScript that could indicate exploitationAffected if Malicious JavaScript code is found stored in web interface configuration fields
Device is affected if it is a SCALANCE S602, S612, S623, or S627-2M running firmware version below 4.0.1.1 and the web-based 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 data4.0.1.1
Update all affected SCALANCE devices to firmware version V4.0.1.1 or later to remediate the XSS vulnerability. As a compensating control, enforce user awareness training to prevent clicking suspicious links while authenticated to the web interface.
- Consultation3.0 h
- Implementation6.0 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-2018-16555 — 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-2018-16555 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
- No spam, self-promotion, credentials, or personal data