Black Friday60% off BLACKFRIDAY2026
Platform
PlansPartners
Resources
ToolsBlogDocs
Labs
CVE ForecastOpservantAll Research →
Sign Up →
`), 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.","sameAs":"https://nvd.nist.gov/vuln/detail/CVE-2023-49293"}},{"@type":"BreadcrumbList","@id":"https://s4e.io/cve/CVE-2023-49293#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://s4e.io"},{"@type":"ListItem","position":2,"name":"CVE","item":"https://s4e.io/cve/CVE-2023-49293"},{"@type":"ListItem","position":3,"name":"CVE-2023-49293","item":"https://s4e.io/cve/CVE-2023-49293"}]}]}
CVE

CVE-2023-49293

6.1
CVSSmedium
Exploitable remotely over the internet · no authentication required · user interaction needed.
Description

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.

Attack Vector
Network
Privileges Req.
None
User Interaction
Required
vite
Updated Nov 10, 2026View on NVD →
S4E scanner
mediumWeb Vulnerabilities~10 seconds

Vite dev server - Cross-Site Scripting

Vite's dev server, when used with `appType: 'custom'` and manually invoking `server.transformIndexHtml` using the unmodified request URL, is vulnerable to XSS via a crafted URL payload. If the HTML being served includes an inline module script (` ... `), an attacker can inject a script via the URL, potentially leading to XSS in the browser. The vulnerability only affects certain custom SSR/dev configurations, not plain `vite dev`. References: https://github.com/vitejs/vite/security/advisories/GHSA-92r3-m2mg-pj97 https://nvd.nist.gov/vuln/detail/CVE-2023-49293

url

Monitor this CVE on your assets

S4E maps published CVEs to scanners and forecasts the next disclosure window for your stack.

Create a free account →