What’s Vulnerable › Vulnerabilities

CVE-2023-43802: Path traversal in Arduino Create Agent

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-10-18 · updated 2026-06-17
• Weakness: CWE-22

Description

Arduino 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.

Affected products

• arduino-create-agent: before 1.3.3 — fixed in 1.3.3

How to fix

Upgrade to a fixed version: arduino-create-agent 1.3.3. Check the vendor advisory for mitigations.

References

• https://github.com/arduino/arduino-create-agent/releases/tag/1.3.3
• https://github.com/arduino/arduino-create-agent/security/advisories/GHSA-75j7-w798-cwwx
• https://www.nozominetworks.com/blog/security-flaws-affect-a-component-of-the-arduino-create-cloud-ide
• https://github.com/arduino/arduino-create-agent/releases/tag/1.3.3
• https://github.com/arduino/arduino-create-agent/security/advisories/GHSA-75j7-w798-cwwx
• https://www.nozominetworks.com/blog/security-flaws-affect-a-component-of-the-arduino-create-cloud-ide

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