CVE-2025-27608 Self Cross-Site Scripting in Arduino IDE
Self-XSS in Arduino IDE allows attackers to execute arbitrary code via malicious input in the Board Manager URLs field.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2025-27608?
CVE-2025-27608 is a low-severity cross-site scripting vulnerability in arduino-ide, published on 2 Apr 2025. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official 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.
Weakness: CWE-79
Which versions are affected by CVE-2025-27608?
How do I fix CVE-2025-27608?
No fix has been published for CVE-2025-27608 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2025-27608 being exploited?
There is no known exploitation of CVE-2025-27608 in the wild and no public exploit code.
Sources
Also known as GHSA-252h-4j5q-88pc.