CVE-2023-49079 — AI Deep Analysis Summary

Q: Root Cause? (CWE/Flaw)

🛡️ **Root Cause**: **Missing Signature Verification**. 🔍 **CWE**: **CWE-347** (Improper Verification of Cryptographic Signature). ❌ **Flaw**: Trusts unverified data as authentic.

Q: Who is affected? (Versions/Components)

📦 **Vendor**: misskey-dev. 📱 **Product**: Misskey. 📅 **Affected**: Versions **2023.11.0 and earlier**. ✅ **Fixed**: Post-2023.11.0.

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

🎭 **Action**: **Impersonate** any remote user. 🔑 **Privileges**: Act as the victim. 📝 **Data**: Forge posts/actions on behalf of others. 📉 **Risk**: High Integrity compromise.

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

🔓 **Threshold**: **LOW**. 🌐 **Network**: Network Accessible (AV:N). 🎯 **Complexity**: Low (AC:L). 👤 **Auth**: None required (PR:N/UI:N). ⚡ **Easy to exploit**.

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

📜 **Public Exp**: **No PoC** listed in data. 🕵️ **Wild Exp**: Unconfirmed. 🔗 **Ref**: GitHub Advisory GHSA-3f39-6537-3cgc. ⚠️ **Status**: Theoretical but critical.

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

🔍 **Check**: Verify Misskey version. 📊 **Scan**: Look for **missing signatures** in API requests. 👀 **Monitor**: Unusual user actions from remote IPs. 🛠️ **Tool**: Check for CVE-2023-49079 in scanners.

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

✅ **Fixed**: Yes. 📥 **Patch**: Update to version **> 2023.11.0**. 🔗 **Source**: Official GitHub Security Advisory. 🔄 **Action**: Upgrade immediately.

Q: Is it urgent? (Priority Suggestion)

🔥 **Priority**: **HIGH**. ⚡ **Urgency**: Critical Integrity Risk. 🚀 **Action**: Patch **immediately**. 📉 **Risk**: Low barrier to entry for attackers.

Updated May 08, 2026 CVSS 9.3 · 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**: Misskey (microblog platform) suffers from **Data Forgery**. <br>⚠️ **Consequences**: Attackers can **impersonate** any remote user.…

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Q2Root Cause? (CWE/Flaw)

🛡️ **Root Cause**: **Missing Signature Verification**. <br>🔍 **CWE**: **CWE-347** (Improper Verification of Cryptographic Signature). <br>❌ **Flaw**: Trusts unverified data as authentic.

Q3Who is affected? (Versions/Components)

📦 **Vendor**: misskey-dev. <br>📱 **Product**: Misskey. <br>📅 **Affected**: Versions **2023.11.0 and earlier**. <br>✅ **Fixed**: Post-2023.11.0.

Q4What can hackers do? (Privileges/Data)

🎭 **Action**: **Impersonate** any remote user. <br>🔑 **Privileges**: Act as the victim. <br>📝 **Data**: Forge posts/actions on behalf of others. <br>📉 **Risk**: High Integrity compromise.

Q5Is exploitation threshold high? (Auth/Config)

🔓 **Threshold**: **LOW**. <br>🌐 **Network**: Network Accessible (AV:N). <br>🎯 **Complexity**: Low (AC:L). <br>👤 **Auth**: None required (PR:N/UI:N). <br>⚡ **Easy to exploit**.

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

📜 **Public Exp**: **No PoC** listed in data. <br>🕵️ **Wild Exp**: Unconfirmed. <br>🔗 **Ref**: GitHub Advisory GHSA-3f39-6537-3cgc. <br>⚠️ **Status**: Theoretical but critical.

Q7How to self-check? (Features/Scanning)

🔍 **Check**: Verify Misskey version. <br>📊 **Scan**: Look for **missing signatures** in API requests. <br>👀 **Monitor**: Unusual user actions from remote IPs. <br>🛠️ **Tool**: Check for CVE-2023-49079 in scanners.

Q8Is it fixed officially? (Patch/Mitigation)

✅ **Fixed**: Yes. <br>📥 **Patch**: Update to version **> 2023.11.0**. <br>🔗 **Source**: Official GitHub Security Advisory. <br>🔄 **Action**: Upgrade immediately.

Q9What if no patch? (Workaround)

🚧 **Workaround**: **Disable** remote user interactions if possible. <br>🛑 **Block**: Restrict unverified API endpoints. <br>👁️ **Monitor**: Log all signature-less requests.…

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Q10Is it urgent? (Priority Suggestion)

🔥 **Priority**: **HIGH**. <br>⚡ **Urgency**: Critical Integrity Risk. <br>🚀 **Action**: Patch **immediately**. <br>📉 **Risk**: Low barrier to entry for attackers.

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Vulnerability detail Full AI analysis (login) misskey-dev CWE-347