How severe is CVE-2025-27608?

CVE-2025-27608 has a CVSS 4.0 base score of 1.0, rated low severity.

Is CVE-2025-27608 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (9th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2025-27608?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-27608 have an EU (EUVD) identifier?

Yes. CVE-2025-27608 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-9623.

When was CVE-2025-27608 published?

CVE-2025-27608 was published on 2025-04-02 and last updated on 2026-06-17.

CVE-2025-27608

CVE-2025-27608 is a low-severity vulnerability with a CVSS 4.0 base score of 1.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Low (CVSS 4.0 base score 1.0)
EPSS exploit prediction: 0% (9th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-9623
Weakness: CWE-79
Published: 2025-04-02
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2025-27608?: 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.
How severe is CVE-2025-27608?: CVE-2025-27608 has a CVSS 4.0 base score of 1.0, rated low severity.
Is CVE-2025-27608 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (9th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2025-27608?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-27608 have an EU (EUVD) identifier?: Yes. CVE-2025-27608 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-9623.
When was CVE-2025-27608 published?: CVE-2025-27608 was published on 2025-04-02 and last updated on 2026-06-17.

References

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