What’s Vulnerable › Vulnerabilities

CVE-2023-49296: Arduino Create Agent vulnerable to Reflected Cross-Site Scripting

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-12-13 · updated 2026-06-17
• Weakness: CWE-79

Description

The Arduino Create Agent allows users to use the Arduino Create applications to upload code to any USB connected Arduino board directly from the browser. A vulnerability in versions prior to 1.3.6 affects the endpoint `/certificate.crt` and the way the web interface of the ArduinoCreateAgent handles custom error messages. An attacker that is able to persuade a victim into clicking on a malicious link can perform a Reflected Cross-Site Scripting attack on the web interface of the create agent, which would allow the attacker to execute arbitrary browser client side code. Version 1.3.6 contains a fix for the issue.

Affected products

• arduino-create-agent: before 1.3.6 — fixed in 1.3.6

How to fix

Upgrade to a fixed version: arduino-create-agent 1.3.6. Check the vendor advisory for mitigations.

References

• https://github.com/arduino/arduino-create-agent/commit/9a0e582bb8a1ff8e70d202943ddef8625ccefcc8
• https://github.com/arduino/arduino-create-agent/security/advisories/GHSA-j5hc-wx84-844h
• https://github.com/arduino/arduino-create-agent/commit/9a0e582bb8a1ff8e70d202943ddef8625ccefcc8
• https://github.com/arduino/arduino-create-agent/security/advisories/GHSA-j5hc-wx84-844h

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