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CVE

CVE-2025-66398

Signal K Server has Unauthenticated State Pollution leading to Remote Code Execution (RCE)
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CVE

CVE-2025-66398

Signal K Server has Unauthenticated State Pollution leading to Remote Code Execution (RCE)

Signal K Server is a server application that runs on a central hub in a boat. Prior to version 2.19.0, an unauthenticated attacker can pollute the internal state (restoreFilePath) of the server via the /skServer/validateBackup endpoint. This allows the attacker to hijack the administrator's "Restore" functionality to overwrite critical server configuration files (e.g., security.json, package.json), leading to account takeover and Remote Code Execution (RCE). Version 2.19.0 patches this vulnerability.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
9.6
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
C
H
U
0
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
C
H
U
-

Related Resources

No items found.

References

https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/66xxx/CVE-2025-66398.json, https://github.com/SignalK/signalk-server/releases/tag/v2.19.0, https://github.com/SignalK/signalk-server/security/advisories/GHSA-w3x5-7c4c-66p9, https://nvd.nist.gov/vuln/detail/CVE-2025-66398

Severity

9.6

CVSS Score
0
10

Basic Information

Ecosystem
Base CVSS
9.6
EPSS Probability
0.00155%
EPSS Percentile
0.36701%
Introduced Version
0
Fix Available
3037c517bb8de70c4b74b61192c57d6176731571

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