CVE-2018-25221 — AI Deep Analysis Summary

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

🚨 **Essence**: Buffer Overflow in `chat.ghp` endpoint. 💥 **Consequences**: Remote attackers can execute **arbitrary code** by sending oversized usernames. Critical integrity & availability loss.

Q: Root Cause? (CWE/Flaw)

🛡️ **CWE**: CWE-787 (Out-of-bounds Write). 🔍 **Flaw**: Improper boundary checks on the username parameter in the chat.ghp endpoint.

Q: Who is affected? (Versions/Components)

🏢 **Vendor**: Echatserver. 📦 **Product**: EChat Server. ⚠️ **Affected**: Version **3.1** specifically.

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

💀 **Privileges**: Remote Code Execution (RCE). 📂 **Data**: Full system compromise. CVSS Score: **9.8** (Critical). No authentication required.

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

🔓 **Threshold**: **LOW**. 🌐 **Access**: Network (AV:N). 🚫 **Auth**: None required (PR:N). 🤝 **UI**: None required (UI:N). Easy to exploit remotely.

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

💣 **Exploit**: Yes. 📚 **Source**: ExploitDB **44155**. 🌍 **Status**: Publicly available. Wild exploitation is possible.

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

🔍 **Check**: Scan for EChat Server v3.1. 📡 **Target**: Look for `chat.ghp` endpoint. 📝 **Test**: Send malformed/oversized username payloads to trigger overflow.

Q: Is it fixed officially? (Patch/Mitigation)

🛠️ **Fix**: Update to patched version. 📢 **Advisory**: See VulnCheck Advisory. ⏳ **Note**: Data shows future publish date, but exploit exists. Patch immediately if available.

Q: What if no patch? (Workaround)

🚧 **Workaround**: Block external access to `chat.ghp`. 🛑 **Mitigation**: Input validation on username fields. 🚫 **Restrict**: Disable the endpoint if not needed.

Q: Is it urgent? (Priority Suggestion)

🔥 **Priority**: **CRITICAL**. 🚨 **Urgency**: Immediate action required. High CVSS + Public Exploit = High Risk. Patch or isolate NOW.

Updated May 06, 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**: Buffer Overflow in `chat.ghp` endpoint. 💥 **Consequences**: Remote attackers can execute **arbitrary code** by sending oversized usernames. Critical integrity & availability loss.

Q2Root Cause? (CWE/Flaw)

🛡️ **CWE**: CWE-787 (Out-of-bounds Write). 🔍 **Flaw**: Improper boundary checks on the username parameter in the chat.ghp endpoint.

Q3Who is affected? (Versions/Components)

🏢 **Vendor**: Echatserver. 📦 **Product**: EChat Server. ⚠️ **Affected**: Version **3.1** specifically.

Q4What can hackers do? (Privileges/Data)

💀 **Privileges**: Remote Code Execution (RCE). 📂 **Data**: Full system compromise. CVSS Score: **9.8** (Critical). No authentication required.

Q5Is exploitation threshold high? (Auth/Config)

🔓 **Threshold**: **LOW**. 🌐 **Access**: Network (AV:N). 🚫 **Auth**: None required (PR:N). 🤝 **UI**: None required (UI:N). Easy to exploit remotely.

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

💣 **Exploit**: Yes. 📚 **Source**: ExploitDB **44155**. 🌍 **Status**: Publicly available. Wild exploitation is possible.

Q7How to self-check? (Features/Scanning)

🔍 **Check**: Scan for EChat Server v3.1. 📡 **Target**: Look for `chat.ghp` endpoint. 📝 **Test**: Send malformed/oversized username payloads to trigger overflow.

Q8Is it fixed officially? (Patch/Mitigation)

🛠️ **Fix**: Update to patched version. 📢 **Advisory**: See VulnCheck Advisory. ⏳ **Note**: Data shows future publish date, but exploit exists. Patch immediately if available.

Q9What if no patch? (Workaround)

🚧 **Workaround**: Block external access to `chat.ghp`. 🛑 **Mitigation**: Input validation on username fields. 🚫 **Restrict**: Disable the endpoint if not needed.

Q10Is it urgent? (Priority Suggestion)

🔥 **Priority**: **CRITICAL**. 🚨 **Urgency**: Immediate action required. High CVSS + Public Exploit = High Risk. Patch or isolate NOW.

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Vulnerability detail Full AI analysis (login) Echatserver CWE-787