CVE-2023-43802: Arduino Create Agent

High severity, CVSS 7.8. EPSS: 0.4% chance of exploitation in the next 30 days.

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)

Published 2023-10-18. Last modified 2026-06-17.