CVE-2024-42366 — AI Deep Analysis Summary

Q: Who is affected? (Versions/Components)

👥 **Affected**: Users of **VRCX** by **vrcx-team**. 🎮 📅 **Version**: All versions **before 2024.03.23**. ⏳ 🔧 **Component**: The underlying CefSharp browser engine integration. 🖥️

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

🚫 **Public Exploit**: **No** public PoC or wild exploitation code found in the data. 🕵️♀️ 📝 **Status**: Only advisory links provided. Hackers might have private exploits, but no public script exists yet. 🔒

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

🔍 **Self-Check**: 1️⃣ Check your VRCX version number! 📱 2️⃣ If it's **< 2024.03.23**, you are **VULNERABLE**. ⚠️ 3️⃣ Look for suspicious notifications or browser pop-ups within the app. 👁️

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

✅ **Fixed**: **YES**! 🎉 🛠️ **Patch**: Updated in version **2024.03.23** or later. 📦 🔗 **Source**: Official GitHub Advisory & Commit `cd2387aa`. 📜 👉 **Action**: Update immediately! 🏃♂️

Q: Is it urgent? (Priority Suggestion)

🔥 **Urgency**: **HIGH** (Critical Impact)! 🚨 📊 **CVSS**: **9.8** (Critical). 📈 💡 **Advice**: Even though it needs user interaction, the **RCE** risk is too high. Update **NOW** to protect your VRChat account and PC! 🛡️💻

Updated May 08, 2026 CVSS 9.1 · 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**: VRCX (VRChat helper) allows **Remote Command Execution (RCE)**! 🤯
💥 **Consequences**: Attackers can hijack your system. It combines **CefSharp XSS** + **High Privileges** to execute arbitrary commands.…

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Q2Root Cause? (CWE/Flaw)

🛡️ **Root Cause**: **CWE-79 (XSS)** in the embedded **CefSharp** browser component. 🌐
⚠️ **Flaw**: Malicious notifications can inject scripts.…

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Q3Who is affected? (Versions/Components)

👥 **Affected**: Users of **VRCX** by **vrcx-team**. 🎮
📅 **Version**: All versions **before 2024.03.23**. ⏳
🔧 **Component**: The underlying CefSharp browser engine integration. 🖥️

Q4What can hackers do? (Privileges/Data)

💣 **Hacker Power**: **Full Remote Command Execution**! 🏴‍☠️
📂 **Data**: Complete access to your files, system settings, and VRChat data.…

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Q5Is exploitation threshold high? (Auth/Config)

🔓 **Threshold**: **Medium/Low**. 📉
🔐 **Auth**: Requires **Low Privileges (PR:L)** to trigger. 🗝️
👀 **UI**: Requires **User Interaction (UI:R)** (e.g., clicking a malicious notification).…

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

🚫 **Public Exploit**: **No** public PoC or wild exploitation code found in the data. 🕵️‍♀️
📝 **Status**: Only advisory links provided. Hackers might have private exploits, but no public script exists yet. 🔒

Q7How to self-check? (Features/Scanning)

🔍 **Self-Check**:
1️⃣ Check your VRCX version number! 📱
2️⃣ If it's **< 2024.03.23**, you are **VULNERABLE**. ⚠️
3️⃣ Look for suspicious notifications or browser pop-ups within the app. 👁️

Q8Is it fixed officially? (Patch/Mitigation)

✅ **Fixed**: **YES**! 🎉
🛠️ **Patch**: Updated in version **2024.03.23** or later. 📦
🔗 **Source**: Official GitHub Advisory & Commit `cd2387aa`. 📜
👉 **Action**: Update immediately! 🏃‍♂️

Q9What if no patch? (Workaround)

🚧 **No Patch? Workaround**:
1️⃣ **Disable Notifications**: Stop clicking unknown alerts inside VRCX. 🚫🔔
2️⃣ **Isolate**: Run VRCX in a sandboxed environment if possible.…

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Q10Is it urgent? (Priority Suggestion)

🔥 **Urgency**: **HIGH** (Critical Impact)! 🚨
📊 **CVSS**: **9.8** (Critical). 📈
💡 **Advice**: Even though it needs user interaction, the **RCE** risk is too high. Update **NOW** to protect your VRChat account and PC! 🛡️💻

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Vulnerability detail Full AI analysis (login) vrcx-team CWE-79