What is CVE-2025-68620?

CVE-2025-68620 is a critical-severity vulnerability in Signalk Signalk-server, classified under Authentication Bypass Using an Alternate Path or Channel. CVSS score: 9.1/10. Published 2026-01-01.

How severe is CVE-2025-68620?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Vulnerability in Signalk Signalk-server

CVE-2025-68620

Signal K Server is a server application that runs on a central hub in a boat. Versions prior to 2.19.0 expose two features that can be chained together to steal JWT authentication tokens without any prior authentication. The attack combine…

EPSS: 0.001 (17.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.

Affected products

Signalk Signalk-server — versions < 2.19.0

Weakness classification (CWE)

CWE-288 — Authentication Bypass Using an Alternate Path or Channel

References

https://github.com/SignalK/signalk-server/security/advisories/GHSA-fq56-hvg6-wvm5 (x_refsource_CONFIRM)
https://github.com/SignalK/signalk-server/releases/tag/v2.19.0 (x_refsource_MISC)

Frequently asked questions

What is CVE-2025-68620?: CVE-2025-68620 is a critical-severity vulnerability in Signalk Signalk-server, classified under Authentication Bypass Using an Alternate Path or Channel. CVSS score: 9.1/10. Published 2026-01-01.
How severe is CVE-2025-68620?: Critical severity. CVSS v3 base score is 9.1 out of 10.