CVE-2023-49293: Vitejs Vite

Medium severity, CVSS 6.1. EPSS: 1% chance of exploitation in the next 30 days.

Vite is a website frontend framework. When Vite's HTML transformation is invoked manually via `server.transformIndexHtml`, the original request URL is passed in unmodified, and the `html` being transformed contains inline module scripts (`<script type="module">...</script>`), it is possible to inject arbitrary HTML into the transformed output by supplying a malicious URL query string to `server.transformIndexHtml`. Only apps using `appType: 'custom'` and using the default Vite HTML middleware are affected. The HTML entry must also contain an inline script. The attack requires a user to click on a malicious URL while running the dev server. Restricted files aren't exposed to the attacker. This issue has been addressed in vite@5.0.5, vite@4.5.1, and vite@4.4.12. There are no known workarounds for this vulnerability.

Affected products

• Vitejs Vite: from 4.4.0, up to and including 4.4.11; from 5.0.0, up to and including 5.0.4; version 5.0.0 only

Published 2023-12-04. Last modified 2026-06-17.