CVE-2018-13800
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 SIMATIC S7-1200 CPU family version 4 (All versions < V4.2.3). The web interface could allow a Cross-Site Request Forgery (CSRF) attack if an unsuspecting user is tricked into accessing a malicious link. Successful exploitation requires user interaction by a legitimate user, who must be authenticated to the web interface. A successful attack could allow an attacker to trigger actions via the web interface that the legitimate user is allowed to perform. This could allow the attacker to read or modify parts of the device configuration.
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 Request Forgery (CSRF) vulnerability in the web interface of SIMATIC S7-1200 CPU family version 4 (all versions < V4.2.3). An attacker can exploit this by tricking an authenticated user into visiting a malicious link, allowing unauthorized read or modification of device configuration.
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< 4.2.3CVSS 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
- High
- Integrity
- High
- Availability
- None
CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/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 device modelAccess the device's web interface or use Siemens management tools (e.g., TIA Portal, STEP 7) to confirm the device is a SIMATIC S7-1200 CPU. Check the device nameplate or system information screen.Affected if Device is a SIMATIC S7-1200 CPU family unit
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Determine firmware versionIn the web interface, navigate to the 'Online Access' or 'Device Information' section to view the firmware version. Alternatively, use TIA Portal or STEP 7 to go online and read the CPU firmware version from the device.Affected if Firmware version is displayed as less than V4.2.3 (e.g., V4.2.2, V4.1.x, V4.0.x)
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Verify web interface is enabledIn the TIA Portal or STEP 7 project, open the CPU properties and check 'Web Server' settings under 'Technology Functions' or 'General' tab. Confirm the 'Enable web server on the device' option is checked.Affected if Web server/web interface is enabled and accessible over HTTP/HTTPS on the device
The device is affected if it is a SIMATIC S7-1200 CPU with firmware version prior to V4.2.3 AND the web interface is enabled, allowing CSRF attacks against authenticated users.
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 data4.2.3
Update SIMATIC S7-1200 CPU firmware to version 4.2.3 or later to obtain the vendor patch. If immediate patching is not feasible, consider network segmentation to limit web interface exposure and implement CSRF tokens as a compensating control.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA2.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2018-13800 — 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-2018-13800 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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