5.3

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3.1

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CVE-2025-24360

CVE-2025-24360: Opening a malicious website while running a Nuxt dev server could allow read-only access to code

Summary

Nuxt allows any websites to send any requests to the development server and read the response due to default CORS settings.

Details

While Vite patched the default CORS settings to fix https://github.com/vitejs/vite/security/advisories/GHSA-vg6x-rcgg-rjx6, nuxt uses its own CORS handler by default (https://github.com/nuxt/nuxt/pull/23995).

https://github.com/nuxt/nuxt/blob/7d345c71462d90187fd09c96c7692f306c90def5/packages/vite/src/client.ts#L257-L263

That CORS handler sets Access-Control-Allow-Origin: *.

[!IMPORTANT]
If on an affected version, it may be possible to opt-out of the default Nuxt CORS handler by configuring vite.server.cors.

PoC

Start a dev server in any nuxt project using Vite by nuxt dev.
Send a fetch request to http://localhost:3000/_nuxt/app.vue (fetch('http://localhost:3000/_nuxt/app.vue')) from a different origin page.

Impact

Users with the default server.cors option using Vite builder may get the source code stolen by malicious websites

Additional Information

/__nuxt_vite_node__/manifest / /__nuxt_vite_node__/module also seems to have Access-Control-Allow-Origin: *, so it maybe also possible to exploit that handler. https://github.com/nuxt/nuxt/blob/7d345c71462d90187fd09c96c7692f306c90def5/packages/vite/src/vite-node.ts#L39 Although I didn't find a valid module id. Note that this handler is probably also vulnerable to DNS rebinding attacks as I didn't find any host header checks.

(GitHub Advisory)

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CVE-2025-24360

CVE-2025-24360:

5.3

CVSS Score

3.1

-

CVSS Score

Basic Information

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Technical Details

Package Name	Ecosystem	Vulnerable Versions	First Patched Version
@nuxt/vite-builder	npm	>= 3.8.1, < 3.15.3	3.15.3

Technical Details

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Root Cause Analysis

The vulnerability stems from Nuxt's custom CORS handler overriding Vite's patched CORS implementation. The key vulnerable functions are: 1) The Vite client middleware handler that used h3's appendCorsHeaders with wildcard origins, visible in client.ts lines 257-263 pre-patch. 2) The Vite Node server middleware that exposed internal endpoints without origin validation. The commit 7eeb910 replaced the wildcard CORS implementation with origin restrictions and proper h3 handleCors usage, confirming these were the vulnerable points. The medium confidence for vite-node.ts stems from advisory notes about potential exploitation despite lack of explicit PoC for module IDs.

Vulnerable functions

Only Mi**o us*rs **n s** t*is s**tion

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WAF Protection Rules

WAF Rule

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Reasoning

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5.3

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CVE-2025-24360: Opening a malicious website while running a Nuxt dev server could allow read-only access to code

Summary

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PoC

Impact

Additional Information

CVE-2025-24360:

5.3

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Technical Details

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Vulnerable functions

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5.3

5.3

CVE-2025-24360: Opening a malicious website while running a Nuxt dev server could allow read-only access to code

Summary

Details

PoC

Impact

Additional Information

Vulnerability Intelligence
Miggo AI

Vulnerability Intelligence
Miggo AI

Vulnerability Intelligence
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