CVE-2025-66398 — AI Deep Analysis Summary

🚨 **Essence**: Signal K Server allows attackers to pollute internal state via unvalidated input. 📉 **Consequences**: This leads to **Account Takeover** and **Remote Code Execution (RCE)**. Critical integrity loss!

🛡️ **Root Cause**: **CWE-78** (OS Command Injection). The flaw lies in failing to validate user inputs before processing, allowing malicious commands to be injected into the server's internal state.

📦 **Affected**: **Signal K Server** (Product: signalk-server). 📅 **Version**: All versions **prior to 2.19.0**. If you are running v2.18.x or lower, you are vulnerable!

💀 **Attacker Capabilities**: With **CVSS 9.8 (Critical)**, attackers can achieve: 🔓 Full Account Control, 💻 Remote Code Execution, 📂 Complete Data Compromise (Confidentiality/Integrity/Availability).

⚠️ **Exploitation Threshold**: **Low**. 🌐 Network Accessible (AV:N), **Low Complexity** (AC:L), **No Privileges Required** (PR:N).…

🔍 **Public Exploit**: **No**. The `pocs` array is empty. No public Proof-of-Concept or wild exploitation code is currently available. However, the severity suggests it will be targeted soon.

🔎 **Self-Check**: Scan for **Signal K Server** instances. Check the version number in the UI or API response. If version < **2.19.0**, you are at risk. Look for command injection patterns in input fields.

✅ **Fixed?**: **Yes**. The vendor released patch **v2.19.0**. 📌 **Action**: Upgrade immediately to v2.19.0 or later. See [GitHub Release](https://github.com/SignalK/signalk-server/releases/tag/v2.19.0).

🛑 **No Patch Workaround**: If you cannot upgrade: 🚫 Restrict network access to the server (firewall rules). 🔒 Disable unnecessary input fields. 👁️ Monitor logs for unusual command execution patterns.…

🔥 **Urgency**: **CRITICAL**. CVSS 9.8 is near-maximum. 🚀 **Priority**: Patch **IMMEDIATELY**. Do not wait for an exploit. Update to v2.19.0 today to prevent RCE and account hijacking.