P3Verified

CVE-2025-66398: signal k server before 2.19.0 (exclusive); +1 more affected products

CVE-2025-66398. CVSS 3.1 base score 8.8 (HIGH, NVD). EPSS 0.1985 (percentile 0.97349), scored 2026-10-05.

Affected technology

signal k server · before 2.19.0 (exclusive)
signalk

signalk-server · < 2.19.0
SignalK

Component: Not specified by the source

Attack conditions (Vendor/CNA, CVSS 3.1): Network (remote) · No privileges required · User interaction required

Attack conditions (NVD, CVSS 3.1): Network (remote) · No privileges required · User interaction required

What an attacker can do

An unauthenticated attacker can pollute the internal state (`restoreFilePath`) of the server via the `/skServer/validateBackup` endpoint. Vendor/CNA’s CVSS 3.1 assessment (base score 9.6/10) rates confidentiality, integrity and availability impact as high. NVD’s CVSS 3.1 assessment (base score 8.8/10) rates confidentiality, integrity and availability impact as high.

Published 2026-10-07 11:51:58.356720+00:00

CWE: CWE-78, CWE-913
CCR priority: 40.2 /100 (P3)
CVSS 3.1: 8.8 /10 · CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H · NVD
EPSS: 0.1985 · percentile 0.97353 · 2026-10-06
KEV: no

Provenance

FIRST EPSS daily exploit-probability · Source record · observed 2026-10-07 11:53:15.413517+00:00 UTC
NVD CVE API 2.0 · Source record · observed 2026-10-07 11:49:32.540646+00:00 UTC

Stable permalink: https://cybercodered.org/item/cve-cve-2025-66398.html