CVE-2025-62522

vite allows server.fs.deny bypass via backslash on Windows

MEDIUM

CVSS Score

Published: October 20, 2025 at 07:57 PM UTC

Updated: October 8, 2026 at 10:10 PM UTC

1 product affected across 1 vendorVite

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Severity

MEDIUM6

Exploit prediction

EPSS 1%

SSVC

PoC

Description

Vite is a frontend tooling framework for JavaScript. In versions from 2.9.18 to before 3.0.0, 3.2.9 to before 4.0.0, 4.5.3 to before 5.0.0, 5.2.6 to before 5.4.21, 6.0.0 to before 6.4.1, 7.0.0 to before 7.0.8, and 7.1.0 to before 7.1.11, files denied by server.fs.deny were sent if the URL ended with \ when the dev server is running on Windows. Only apps explicitly exposing the Vite dev server to the network and running the dev server on Windows were affected. This issue has been patched in versions 5.4.21, 6.4.1, 7.0.8, and 7.1.11.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Vite · Vitejsnpm

90%

>= 2.9.18, < 3.0.0>= 3.2.9, < 4.0.0>= 4.5.3, < 5.0.0>= 5.2.6, < 5.4.21>= 6.0.0, < 6.4.1>= 7.0.0, < 7.0.8>= 7.1.0, < 7.1.11

Affected range stops below 3.0.0, so it looks safe — our inference, not a vendor statement

Affected range stops below 4.0.0, so it looks safe — our inference, not a vendor statement

Affected range stops below 5.0.0, so it looks safe — our inference, not a vendor statement

Affected range stops below 5.4.21, so it looks safe — our inference, not a vendor statement

Affected range stops below 6.4.1, so it looks safe — our inference, not a vendor statement

Affected range stops below 7.0.8, so it looks safe — our inference, not a vendor statement

Affected range stops below 7.1.11, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (2)

x_refsource_CONFIRM

Source: cverecord

https://github.com/vitejs/vite/security/advisories/GHSA-93m4-6634-74q7

x_refsource_MISC

Source: cverecord

https://github.com/vitejs/vite/commit/f479cc57c425ed41ceb434fecebd63931b1ed4ed

SSVC — Action Prioritization

SSVCPoCNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6MEDIUMGitHub_M

Vector?

Quick Info

StatusDEFERRED

CWE

CWE-22

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