CVE-2023-51389 — AI Deep Analysis Summary

Q: Root Cause? (CWE/Flaw)

🛡️ **Root Cause**: **CWE-502** (Deserialization of Untrusted Data). The `/define/yml` endpoint uses **SnakeYAML** without secure configuration. ⚠️ It trusts input blindly, allowing malicious payloads to execute code.

Q: Who is affected? (Versions/Components)

🎯 **Affected**: **Hertzbeat** by **dromara**. 📅 **Version**: All versions **before 1.4.1**. If you are running 1.4.0 or older, you are vulnerable.

Q: What can hackers do? (Privileges/Data)

💀 **Attacker Power**: **RCE (Remote Code Execution)**. 📂 **Impact**: High Confidentiality, Integrity, and Availability loss. Hackers can run arbitrary commands, steal monitoring data, or crash the server.

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

🔓 **Threshold**: **LOW**. 🚫 **Auth**: None required (`PR:N`). 🌐 **Network**: Remote (`AV:N`). 🧠 **Complexity**: Low (`AC:L`). No user interaction needed (`UI:N`). Easy to exploit!

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

📦 **Public Exp?**: No specific PoC code listed in data. 🌍 **Wild Exp**: Likely possible due to low complexity. ⚠️ Assume it is exploitable in the wild until patched.

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

🔍 **Self-Check**: Scan for **Hertzbeat** services. 📡 Check if version is **< 1.4.1**. 🕸️ Test the `/define/yml` endpoint for YAML parsing behavior. Use CVE scanners to detect CWE-502 patterns.

Q: What if no patch? (Workaround)

🚧 **No Patch?**: **Block** access to `/define/yml` via WAF/Network ACL. 🚫 **Restrict**: Limit network access to the Hertzbeat UI. 🛑 **Disable**: If possible, disable the YAML definition feature temporarily.

Q: Is it urgent? (Priority Suggestion)

🔥 **Urgency**: **CRITICAL**. 🚨 **Priority**: **P1**. CVSS 9.8 + No Auth Required = Immediate action needed. Patch immediately to prevent RCE.

Updated May 08, 2026 CVSS 9.8 · 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**: Hertzbeat < 1.4.1 suffers from **YAML Deserialization** via `/define/yml`. 📉 **Consequences**: Full system compromise. CVSS 9.8 (Critical).…

Read full answer (login)

Q2Root Cause? (CWE/Flaw)

🛡️ **Root Cause**: **CWE-502** (Deserialization of Untrusted Data). The `/define/yml` endpoint uses **SnakeYAML** without secure configuration. ⚠️ It trusts input blindly, allowing malicious payloads to execute code.

Q3Who is affected? (Versions/Components)

🎯 **Affected**: **Hertzbeat** by **dromara**. 📅 **Version**: All versions **before 1.4.1**. If you are running 1.4.0 or older, you are vulnerable.

Q4What can hackers do? (Privileges/Data)

💀 **Attacker Power**: **RCE (Remote Code Execution)**. 📂 **Impact**: High Confidentiality, Integrity, and Availability loss. Hackers can run arbitrary commands, steal monitoring data, or crash the server.

Q5Is exploitation threshold high? (Auth/Config)

🔓 **Threshold**: **LOW**. 🚫 **Auth**: None required (`PR:N`). 🌐 **Network**: Remote (`AV:N`). 🧠 **Complexity**: Low (`AC:L`). No user interaction needed (`UI:N`). Easy to exploit!

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

📦 **Public Exp?**: No specific PoC code listed in data. 🌍 **Wild Exp**: Likely possible due to low complexity. ⚠️ Assume it is exploitable in the wild until patched.

Q7How to self-check? (Features/Scanning)

🔍 **Self-Check**: Scan for **Hertzbeat** services. 📡 Check if version is **< 1.4.1**. 🕸️ Test the `/define/yml` endpoint for YAML parsing behavior. Use CVE scanners to detect CWE-502 patterns.

Q8Is it fixed officially? (Patch/Mitigation)

✅ **Fixed?**: **YES**. 🛠️ **Patch**: Upgrade to **Hertzbeat 1.4.1** or later.…

Read full answer (login)

Q9What if no patch? (Workaround)

🚧 **No Patch?**: **Block** access to `/define/yml` via WAF/Network ACL. 🚫 **Restrict**: Limit network access to the Hertzbeat UI. 🛑 **Disable**: If possible, disable the YAML definition feature temporarily.

Q10Is it urgent? (Priority Suggestion)

🔥 **Urgency**: **CRITICAL**. 🚨 **Priority**: **P1**. CVSS 9.8 + No Auth Required = Immediate action needed. Patch immediately to prevent RCE.

Continue exploring

Vulnerability detail Full AI analysis (login) dromara CWE-502