CVE-2025-66398 is a critical vulnerability affecting Signal K Server versions prior to 2.19.0. An unauthenticated attacker can manipulate the server's internal state via the /skServer/validateBackup endpoint, leading to administrator account takeover and Remote Code Execution (RCE) by overwriting critical configuration files. With a CVSS score of 8.8 (HIGH), this vulnerability is easily exploitable over the network with low complexity and no user interaction, resulting in high impact to confidentiality, integrity, and availability. While there is no evidence of active exploitation or public exploit code, the vulnerability has garnered some community discussion.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 2.19.0CPE matchmatch criteria | cpe:2.3:a:signalk:signal_k_server:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.1 Security Researcher mentions.