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CVE-2024-42366— VR Overlay RCE

Quick assessment

Affected
vrcx-team VRCX
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

VRCX是VRCX团队的一个 VRChat 的助手/配套应用程序。 VRCX 2024.03.23之前版本存在安全漏洞，该漏洞源于具有超权限和通过覆盖通知进行跨站脚本的CefSharp浏览器可以组合使用，从而导致远程命令执行。

CVSS 9.1 · Critical EPSS 0.79% · P55
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I. Basic Information for CVE-2024-42366

Vulnerability Information
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Vulnerability Title
VR Overlay RCE
Source: CVE Program / CVE List V5
Vulnerability Description
VRCX is an assistant/companion application for VRChat. In versions prior to 2024.03.23, a CefSharp browser with over-permission and cross-site scripting via overlay notification can be combined to result in remote command execution. These vulnerabilities are patched in VRCX 2023.12.24. In addition to the patch, VRCX maintainers worked with the VRC team and blocked the older version of VRCX on the VRC's API side. Users who use the older version of VRCX must update their installation to continue using VRCX.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
VRCX 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
VRCX是VRCX团队的一个 VRChat 的助手/配套应用程序。 VRCX 2024.03.23之前版本存在安全漏洞，该漏洞源于具有超权限和通过覆盖通知进行跨站脚本的CefSharp浏览器可以组合使用，从而导致远程命令执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Shenlong Deep Dive — AI Deep Analysis

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Affected Products

Vendor Product Affected Versions CPE Subscribe
vrcx-team VRCX < 2024.03.23 -

II. Public POCs for CVE-2024-42366

# POC Description Source Link Shenlong Link
AI-Generated POC Verified env Premium
Reproduced successfully in a real sandbox · Below is the actual recording of building the environment and exploiting the vulnerability.
Success marker: VULNERABLE: XSS via unsanitized overlay notification image field led to RCE — /tmp/vrcx-rce-pwned created via CefSharp AppApiVr elevated binding
Reproduction recording is a Pro+ exclusive
Watch the full sandbox build + live exploit recording for this CVE. Limited-time ¥499/mo.
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claude_code · 9303 chars
GitHub 复现环境（可 clone 直接跑）
Pro+ exclusive includes:
Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
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Full executable POC code
Exploit chain & mitigation
POC zip download
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III. Intelligence Information for CVE-2024-42366

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Patches & Fixes for CVE-2024-42366 (1)

Vendor Advisories for CVE-2024-42366 (1)

IV. Related Vulnerabilities

Same weakness: CWE-79

V. Comments for CVE-2024-42366

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