CVE-2024-42366: VRCX is an assistant/companion application for VRChat

Q: How do I fix CVE-2024-42366?

vrcx: upgrade to 2024.03.23. Exact commands for each OS are on this page.

Q: Is CVE-2024-42366 being exploited?

CVE-2024-42366 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2024-42366 affect?

CVE-2024-42366 affects vrcx. Severity is critical (CVSS 9.0). 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 v

Q: How urgent is CVE-2024-42366?

Priority 46/100. Critical severity

This month

CRITICAL 9.0UPGRADE

CVE-2024-42366 is a critical-severity flaw (CVSS 9.0) affecting vrcx. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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

Why this priority

Critical severity

A fixed release or distro patch exists.

Risk facts

CVSS score	9.0 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.8% (top 44%)
CISA exploited list	No
Weakness	CWE-79, CWE-269
Published	2024-08-08
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: vrcx-team

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2024-08-08 17:15 UTCPublished CVE record published
2026-06-17 07:49 UTCUpdated Record last modified

vrcx-team vrcx UPGRADE

Affected: < 2024.03.23

Fixed in: 2024.03.23

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy vrcx || rpm -q vrcx || vrcx --version

2. UPGRADE to 2024.03.23 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade vrcx

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade vrcx

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2024-42366?

vrcx: upgrade to 2024.03.23. Exact commands for each OS are on this page.

Is CVE-2024-42366 being exploited?

CVE-2024-42366 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2024-42366 affect?

CVE-2024-42366 affects vrcx. Severity is critical (CVSS 9.0). 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 v

How urgent is CVE-2024-42366?

Priority 46/100. Critical severity

References

← Back to latest CVEs