CVE-2025-27608 Information

Description

Arduino IDE 2.x is an IDE based on the Theia IDE framework and built with Electron. A Self Cross-Site Scripting (XSS) vulnerability has been identified within the Arduino-IDE prior to version v2.3.5. The vulnerability occurs in the Additional Board Manager URLs field which can be found in the Preferences -> Settings section of the Arduino IDE interface. In the vulnerable versions any values entered in this field are directly displayed to the user through a notification tooltip object without a proper output encoding routine due to the underlying ElectronJS engine interpretation. This vulnerability exposes the input parameter to Self-XSS attacks which may lead to security risks depending on where the malicious payload is injected. This vulnerability is fixed in 2.3.5.

Reference

https://github.com/arduino/arduino-ide/commit/d298b3ffc94008e89066cd999d891e84190da18f https://github.com/arduino/arduino-ide/security/advisories/GHSA-252h-4j5q-88pc