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CVE-2023-49293— Cross-site Scripting in `server.transformIndexHtml` via URL payload in vite

Quick assessment

Affected
vitejs vite
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.

Vite是Vite开源的一种新型的前端构建工具。 Vite存在跨站脚本漏洞，该漏洞源于通过提供恶意URL查询字符串，可以将任意HTML注入输出。

CVSS 6.1 · Medium EPSS 1.00% · P62

Public Exploits 1

Nuclei · 1 CVE-2023-49293.yaml [template]
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I. Basic Information for CVE-2023-49293

Vulnerability Information
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Vulnerability Title
Cross-site Scripting in `server.transformIndexHtml` via URL payload in vite
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
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
Vite 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Vite是Vite开源的一种新型的前端构建工具。 Vite存在跨站脚本漏洞，该漏洞源于通过提供恶意URL查询字符串，可以将任意HTML注入输出。
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)

Affected Products

Vendor Product Affected Versions CPE Subscribe
vitejs vite >=4.4.0, < 4.4.12 -

II. Public POCs for CVE-2023-49293

# POC Description Source Link Shenlong Link
1 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 (`<script type="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`. https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2023/CVE-2023-49293.yaml POC Details
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III. Intelligence Information for CVE-2023-49293

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Vendor Advisories for CVE-2023-49293 (1)

IV. Related Vulnerabilities

Same product: vite
Same vendor: vitejs
Same weakness: CWE-79

V. Comments for CVE-2023-49293

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