CVE-2024-42366: vrcx XSS — Fix

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.

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CVSS v3.1 Score

9.0

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

Weakness Type (CWE)

CWE-79 Cross-site Scripting (XSS)

CWE-269 CWE-269

Affected Products

Vendor	Product	Versions
vrcx-team	vrcx	< 2024.03.23

References

Advisories & Patches

https://github.com/vrcx-team/VRCX/commit/cd2387aa3289f936ce60049121c24b0765bd4180 https://github.com/vrcx-team/VRCX/security/advisories/GHSA-j98g-mgjm-wqph

Frequently Asked Questions

What is CVE-2024-42366? +

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. It has a CVSS v3.1 base score of 9.0 (CRITICAL).

How severe is CVE-2024-42366? +

CVE-2024-42366 has a CVSS v3.1 score of 9.0 out of 10, rated CRITICAL. This is a critical vulnerability that should be patched immediately.

What products are affected by CVE-2024-42366? +

CVE-2024-42366 affects products from vrcx-team, specifically: vrcx. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-42366? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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CVE-2024-42366