Arduino IDE up to 2.3.4 Settings Section cross site scripting

Summaryinfo

A vulnerability identified as problematic has been detected in Arduino IDE up to 2.3.4. Affected by this issue is some unknown functionality of the component Settings Section. The manipulation leads to cross site scripting. This vulnerability is referenced as CVE-2025-27608. Remote exploitation of the attack is possible. No exploit is available. You should upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Arduino IDE up to 2.3.4. This issue affects some unknown functionality of the component Settings Section. The manipulation with an unknown input leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. Impacted is integrity. The summary by CVE is:

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.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2025-27608 since 03/03/2025. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1059.007 according to MITRE ATT&CK.

Upgrading to version 2.3.5 eliminates this vulnerability. Applying the patch d298b3ffc94008e89066cd999d891e84190da18f is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Vendor

• Arduino

Name

• IDE

Version

• 2.3.0
• 2.3.1
• 2.3.2
• 2.3.3
• 2.3.4

License

• open-source

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CPE 2.2info

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