CVE-2025-30215 — AI Deep Analysis Summary

Q: What is this vulnerability? (Essence + Consequences)

🚨 **Essence**: A critical security flaw in NATS-Server. 📉 **Consequences**: Lack of access control on JS API requests leads to potential **data destruction** and system instability.

Q: Root Cause? (CWE/Flaw)

🛡️ **Root Cause**: **CWE-306** (Missing Authentication for Critical Function). The core flaw is the absence of proper access control mechanisms for specific API endpoints.

Q: Is exploitation threshold high? (Auth/Config)

🔓 **Exploitation Threshold**: **Low**. • Attack Vector: Network (AV:N). • Complexity: Low (AC:L). • Privileges Required: Low (PR:L). • User Interaction: None (UI:N).

Q: Is there a public Exp? (PoC/Wild Exploitation)

🕵️ **Public Exploit**: **No**. The `pocs` field is empty. No public Proof-of-Concept or wild exploitation code is currently available.

Q: How to self-check? (Features/Scanning)

🔍 **Self-Check**: 1. Identify your NATS-Server version. 2. Check if it falls within the vulnerable ranges (2.2.0–2.10.26, 2.11.0–2.11.1). 3. Review JS API access logs for unauthorized access attempts.

Q: What if no patch? (Workaround)

🚧 **No Patch Workaround**: • Implement strict **Network Access Control Lists (ACLs)** on JS API ports. • Enforce **Authentication** at the reverse proxy/load balancer level before requests reach the server.

Q: Is it urgent? (Priority Suggestion)

⚡ **Urgency**: **HIGH**. • CVSS Score: **8.6** (High). • Impact: High Integrity & Availability. • Action: Patch immediately to prevent data corruption.

Updated May 06, 2026 CVSS 9.6 · Critical

This is a summary of the AI-generated 10-question deep analysis. The full version (longer answers, follow-up Q&A, related CVEs) requires login. Read the full analysis →

Q1What is this vulnerability? (Essence + Consequences)

🚨 **Essence**: A critical security flaw in NATS-Server. 📉 **Consequences**: Lack of access control on JS API requests leads to potential **data destruction** and system instability.

Q2Root Cause? (CWE/Flaw)

🛡️ **Root Cause**: **CWE-306** (Missing Authentication for Critical Function). The core flaw is the absence of proper access control mechanisms for specific API endpoints.

Q3Who is affected? (Versions/Components)

📦 **Affected Versions**: 
• NATS-Server **2.2.0** to **2.10.27** (exclusive of 2.10.27?…

Read full answer (login)

Q4What can hackers do? (Privileges/Data)

💥 **Attacker Capabilities**: With low privileges, hackers can bypass JS API security.…

Read full answer (login)

Q5Is exploitation threshold high? (Auth/Config)

🔓 **Exploitation Threshold**: **Low**. 
• Attack Vector: Network (AV:N). 
• Complexity: Low (AC:L). 
• Privileges Required: Low (PR:L). 
• User Interaction: None (UI:N).

Q6Is there a public Exp? (PoC/Wild Exploitation)

🕵️ **Public Exploit**: **No**. The `pocs` field is empty. No public Proof-of-Concept or wild exploitation code is currently available.

Q7How to self-check? (Features/Scanning)

🔍 **Self-Check**: 
Identify your NATS-Server version. 
Check if it falls within the vulnerable ranges (2.2.0–2.10.26, 2.11.0–2.11.1). 
Review JS API access logs for unauthorized access attempts.

Q8Is it fixed officially? (Patch/Mitigation)

✅ **Official Fix**: **Yes**. Updates are available. 
• Upgrade to **NATS-Server 2.10.27** or later. 
• Upgrade to **NATS-Server 2.11.2** or later.…

Read full answer (login)

Q9What if no patch? (Workaround)

🚧 **No Patch Workaround**: 
• Implement strict **Network Access Control Lists (ACLs)** on JS API ports. 
• Enforce **Authentication** at the reverse proxy/load balancer level before requests reach the server.

Q10Is it urgent? (Priority Suggestion)

⚡ **Urgency**: **HIGH**. 
• CVSS Score: **8.6** (High). 
• Impact: High Integrity & Availability. 
• Action: Patch immediately to prevent data corruption.

Continue exploring

Vulnerability detail Full AI analysis (login) nats-io CWE-306