Create AgentApplication · Arduino
CVE-2023-43802
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 · uneditedArduino Create Agent is a package to help manage Arduino development. This vulnerability affects the endpoint `/upload` which handles request with the `filename` parameter. A user who has the ability to perform HTTP requests to the localhost interface, or is able to bypass the CORS configuration, can escalate their privileges to those of the user running the Arduino Create Agent service via a crafted HTTP POST request. This issue has been addressed in version `1.3.3`. Users are advised to upgrade. There are no known workarounds for this vulnerability.
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 Arduino Create Agent /upload endpoint contains a vulnerability in its handling of the filename parameter. Attackers who can make HTTP requests to the localhost interface or bypass CORS controls can submit crafted HTTP POST requests to escalate privileges to those of the user running the Arduino Create Agent service.
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
Create AgentApplication
< 1.3.3CVSS 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
- Local
- Complexity
- Low
- Privileges
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:L/AC:L/PR:L/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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Locate Arduino Create Agent installationCheck for the Arduino Create Agent service or process running on the system. Common installation paths include C:\Program Files\Arduino Create Agent on Windows or /usr/local/arduino-create-agent on Linux. Also check for process named 'arduino-create-agent' or similar.Affected if The software is not installed or the service is not running, then the system is not affected by this specific vulnerability.
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Determine installed versionCheck the version of Arduino Create Agent. On Windows, right-click the Arduino Create Agent icon in the system tray and select 'About' or check the installed program's version property. On Linux, check the package or binary version with --version flag if available, or examine the application files for version metadata.Affected if The installed version is less than 1.3.3 (any version string showing 1.3.2, 1.3.1, 1.3.0 or earlier).
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Verify localhost interface accessibilityCheck if the Arduino Create Agent localhost HTTP interface is accessible. The agent typically listens on localhost ports (commonly 8991 or similar). Attempt to access http://localhost:8991 or check if the service binds to 127.0.0.1.Affected if The localhost interface is exposed to untrusted network paths or the CORS controls can be bypassed, allowing external attackers to reach the /upload endpoint.
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Inspect /upload endpoint configurationIf accessible, examine the /upload endpoint behavior. The vulnerability lies in how the filename parameter in POST requests to the /upload endpoint is processed. Verify if the endpoint accepts arbitrary filename values without proper validation.Affected if The /upload endpoint accepts and processes filename parameters from unauthenticated or untrusted sources.
You are affected if Arduino Create Agent version is below 1.3.3 AND the localhost interface or CORS controls can be accessed by an attacker, allowing them to reach the /upload endpoint for privilege escalation.
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.
dbcve · scoped1.3.3
Upgrade Arduino Create Agent to version 1.3.3 or later to remediate this vulnerability. There are no available workarounds.
1.3.3
- Stop the Arduino Create Agent service if currently running
- Download Arduino Create Agent version 1.3.3 from the official Arduino distribution source
- Install or upgrade to version 1.3.3 of the Arduino Create Agent
- Restart the Arduino Create Agent service to apply the update
Generated from the published advisory — verify against the referenced sources before acting.
Fix this in Create Agent
Scoped from the published advisory
- Consultation2.0 h
- Implementation2.0 h
- Testing4.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $2,752.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2023-43802 — 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-2023-43802 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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