External risk intelligence

Frontend Tooling Framework Information Exposure Advisory

CVE advisoryKnown Exploit

CVE-2025-31125

Vite development servers can expose non-allowed file content when networked, risking unauthorized data access for affected organizations.

2Halo Surface Signal

Information Disclosure

Vitejs Vite

before 4.5.115.0.0 to before 5.4.166.0.0 to before 6.0.136.1.0 to before 6.1.36.2.0 to before 6.2.4

External exposure likelihood

Halo Surface Signal score for CVE-2025-31125

Vite is a build-time development tool. The vulnerability only affects the Vite dev server when it is explicitly configured to listen on a network interface (e.g., using --host). This is a non-standard configuration for development environments and is not a default or common practice for internet-facing production deployments.

Horizon Alert

Summary of the vulnerability and why it matters

Vite, a framework for frontend development, has a flaw that allows unauthorized access to sensitive files. This occurs when the Vite development server is configured to be accessible over a network. The vulnerability could expose internal application files that should not be publicly available.

  • Vulnerable component: Vite development server
  • Core weakness: Exposure of non-allowed file content
  • Main business impact: Unauthorized data disclosure

Attack Path

How an attacker could exploit the issue

Vite exposes sensitive file content when its development server is intentionally made accessible over a network. This allows an attacker to access information that should not be exposed. The attack path involves an attacker gaining access to the network where the development server is exposed, triggering a specific request to access unauthorized files.

  • Exposure requires a network-accessible dev server.
  • Attacker sends a crafted request.
  • Unauthorized file content is revealed.

Live Threat

Current exploitation, exposure, and threat context

This vulnerability in Vite, a frontend tooling framework, allows for the exposure of content from non-allowed files. This can occur when the Vite development server is explicitly made accessible over a network. Attackers could potentially access sensitive information through specially crafted URLs. The impact is limited to organizations actively exposing their Vite development server to the network.

  • Attackers with no specialized skills.
  • Vite development server exposed to the network.
  • Potential for unauthorized data access.

Priority actions

Operational Fix

Recommended remediation, mitigation, and detection steps

This vulnerability allows unauthorized access to sensitive files through specific query parameters when the Vite development server is exposed to the network. Organizations should identify systems using Vite and exposed to the network, and then take steps to limit this exposure. Applying the vendor-provided fix and confirming its successful implementation is crucial, followed by ongoing monitoring for related activities.

  • Find exposed Vite development servers.
  • Restrict network access to these servers.
  • Apply vendor updates and verify.
  • Monitor for suspicious activity.

Frequently asked questions

What is Vite and how does this vulnerability affect it?

Vite is a frontend tooling framework for JavaScript used in web development. This vulnerability allows Vite to expose content from non-allowed files when its development server is intentionally exposed to a network.

What is the weakness class for CVE-2025-31125 and what is the technical impact?

The weakness classes identified are CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor) and CWE-284 (Improper Access Control). Technically, Vite exposes content of non-allowed files using specific query parameters like ?inline&import or ?raw?import, leading to unauthorized data disclosure.

How can an attacker exploit this vulnerability, and is the scope limited?

An attacker can exploit this by sending a crafted request to a Vite development server that is explicitly exposed to the network. The vulnerability's scope is limited to applications that have intentionally exposed their Vite development server to the network, for example, by using the `--host` flag or the `server.host` configuration option.

What is the relevance of the Halo Surface Signal for this vulnerability?

The Halo Surface Signal indicates this vulnerability is 'Unlikely' to be a significant threat because Vite is primarily a build-time development tool. The vulnerability only affects the development server when it's explicitly configured for network access, which is not a standard or common practice for production environments.

What are the recommended steps to mitigate this vulnerability?

To mitigate this vulnerability, organizations should identify any Vite development servers exposed to the network. It is crucial to restrict network access to these servers and apply the vendor-provided updates (versions 6.2.4, 6.1.3, 6.0.13, 5.4.16, or 4.5.11). Verification of the update's successful implementation and ongoing monitoring for suspicious activity are also recommended.

References