CVE-2019-14451
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 · uneditedRepetierServer.exe in Repetier-Server 0.8 through 0.91 does not properly validate the XML data structure provided when uploading a new printer configuration. When this is combined with CVE-2019-14450, an attacker can upload an "external command" configuration as a printer configuration, and achieve remote code execution. After exploitation, loading of the external command configuration is dependent on a system reboot or service restart.
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 confidenceThe RepetierServer.exe in Repetier-Server versions 0.8 through 0.91 fails to properly validate XML data structures during printer configuration uploads. Combined with CVE-2019-14450, this allows attackers to upload malicious 'external command' configurations as printer configurations, achieving persistent remote code execution that activates after system reboot or service restart.
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>= 0.80, <= 0.91CVSS 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
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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 if Repetier-Server is installedLook for RepetierServer.exe in running processes or check for the Repetier-Server service. On Windows, check Services list or Task Manager. On Linux, check for repetier-server process.Affected if RepetierServer.exe process or service is found running on the system
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Determine installed versionAccess the Repetier-Server web interface and check the server version displayed on the main dashboard, or check the application logs. Compare the version number against the affected range >= 0.80 and <= 0.91.Affected if The installed version falls within 0.80 through 0.91 inclusive
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Verify admin interface accessibilityCheck if the Repetier-Server web administration interface is accessible over the network. Attempt to access the web interface on the configured port (default 3344).Affected if The admin interface is reachable from network or untrusted locations
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Inspect printer configurations for external commandsIn the Repetier-Server web interface, navigate to Printer Configuration > Printer Settings. Look for any entries in fields related to 'external command', 'Gcode scripts', or 'custom commands' that contain unexpected or suspicious shell commands, scripts, or system calls.Affected if Any printer configuration contains custom external command entries that were not intentionally configured by an administrator
The system is affected if Repetier-Server version 0.80-0.91 is running and the XML validation flaw allows external command configurations to be uploaded as printer configurations.
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 Repetier-Server to a version beyond 0.91 which contains proper XML validation and blocks external command configuration uploads. If immediate patching is not possible, restrict network access to the Repetier-Server administration interface.
- Consultation3.0 h
- Implementation2.0 h
- Testing4.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2019-14451 — 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-2019-14451 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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