CVE-2025-24963: @vitest/browser Vitest Browser Mode Serves Arbitrary Vulnerability
MODERATECVE-2025-24963 is a MODERATE (CVSS 5.9) vitest browser mode serves arbitrary vulnerability (CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')) affecting @vitest/browser libraries in the npm ecosystem. The issue involves vitest browser mode serves arbitrary files. Remediation is available by upgrading affected packages to version 2.1.9, 3.0.4.
CVE-2025-24963 at a Glance
Security Impact
CVSS: 5.9
The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N).
How to Fix CVE-2025-24963
To remediate this vulnerability, upgrade all affected @vitest/browser dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.
npm install @vitest/browser@2.1.9npm install @vitest/browser@3.0.4Run the following command in your project directory to verify that all resolved dependencies use the patched release:
npm ls @vitest/browserHow to Check if You Are Affected
To determine whether your Node.js application is affected by CVE-2025-24963, inspect your project dependencies using npm:
npm ls @vitest/browserAnalyze the terminal output to locate any version of @vitest/browser in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.1.9), your application is affected.
Note: The npm ls @vitest/browser command inspects dependencies declared in your package.json and lockfile; it does not perform automated runtime dynamic scanning.
Technical Details
Vulnerability Mechanism & Technical Analysis
This vulnerability is classified under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal'), where the product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. In @vitest/browser, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.
Source Advisory Statement
CVE-2025-24963 Affected @vitest/browser Versions
2 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
@vitest/browser
|
npm |
≥ 2.0.4
< 2.1.9
|
2.1.9
|
|
@vitest/browser
|
npm |
≥ 3.0.0
< 3.0.4
|
3.0.4
|
References
Frequently Asked Questions
What is CVE-2025-24963?
Which @vitest/browser versions are affected?
What version fixes CVE-2025-24963?
Is @vitest/browser affected?
What is the CVSS score of CVE-2025-24963?
What CWE is associated with CVE-2025-24963?
How can I check npm dependencies for CVE-2025-24963?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-8gvc-j273-4wm5",
"modified" : "2025-02-04T22:03:47Z",
"published" : "2025-02-04T16:51:08Z",
"aliases" : [ "CVE-2025-24963" ],
"summary" : "Vitest browser mode serves arbitrary files",
"details" : "### Summary\n`__screenshot-error` handler on the browser mode HTTP server that responds any file on the file system. Especially if the server is exposed on the network by [`browser.api.host: true`](https://vitest.dev/guide/browser/config.html#browser-api), an attacker can send a request to that handler from remote to get the content of arbitrary files.\n\n### Details\nThis `__screenshot-error` handler on the browser mode HTTP server responds any file on the file system.\nhttps://github.com/vitest-dev/vitest/blob/f17918a79969d27a415f70431e08a9445b051e45/packages/browser/src/node/plugin.ts#L88-L130\n\nThis code was added by https://github.com/vitest-dev/vitest/commit/2d62051f13b4b0939b2f7e94e88006d830dc4d1f.\n\n### PoC\n1. Create a directory and change the current directory to that directory\n1. Run `npx vitest init browser`\n1. Run `npm run test:browser`\n2. Run `curl http://localhost:63315/__screenshot-error?file=/path/to/any/file`\n\n### Impact\nUsers explicitly exposing the browser mode server to the network by [`browser.api.host: true`](https://vitest.dev/guide/browser/config.html#browser-api) may get any files exposed.",
"severity" : [ {
"type" : "CVSS_V3",
"score" : "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N"
} ],
"affected" : [ {
"package" : {
"ecosystem" : "npm",
"name" : "@vitest/browser"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "2.0.4"
}, {
"fixed" : "2.1.9"
} ]
} ]
}, {
"package" : {
"ecosystem" : "npm",
"name" : "@vitest/browser"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "3.0.0"
}, {
"fixed" : "3.0.4"
} ]
} ]
} ],
"references" : [ {
"type" : "WEB",
"url" : "https://github.com/vitest-dev/vitest/security/advisories/GHSA-8gvc-j273-4wm5"
}, {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-24963"
}, {
"type" : "WEB",
"url" : "https://github.com/vitest-dev/vitest/commit/2d62051f13b4b0939b2f7e94e88006d830dc4d1f"
}, {
"type" : "WEB",
"url" : "https://github.com/vitest-dev/vitest/commit/ed9aeba212df04b83ed01810780663ff2cdd0adf"
}, {
"type" : "PACKAGE",
"url" : "https://github.com/vitest-dev/vitest"
}, {
"type" : "WEB",
"url" : "https://github.com/vitest-dev/vitest/blob/f17918a79969d27a415f70431e08a9445b051e45/packages/browser/src/node/plugin.ts#L88-L130"
}, {
"type" : "WEB",
"url" : "https://vitest.dev/guide/browser/config.html#browser-api"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-22" ],
"severity" : "MODERATE",
"github_reviewed" : true,
"github_reviewed_at" : "2025-02-04T16:51:08Z",
"nvd_published_at" : "2025-02-04T20:15:50Z"
}
}