CVE-2025-46565 Scanner

The Vite Dev Server is primarily utilized by developers and organizations involved in front-end development projects. It is a highly efficient tooling framework designed for modern JavaScript applications. Used mainly in environments requiring rapid frontend building, the software provides necessary features to streamline development workflows. Developers use it to create client-side applications efficiently by eliminating bundling time and enabling direct development on source files. Its flexible configuration options make it desirable for both small projects and large enterprise applications. The dev server can be made public when configured with certain options, posing potential security risks if not carefully managed.

The vulnerability identified in the Vite Dev Server relates to the improper handling of file patterns, allowing for certain file contents to be exposed to unauthorized clients. Specifically, the vulnerability affects applications that expose the Vite dev server to a network, utilizing configurations like --host or server.host. This disclosure occurs when certain disallowed files are accessed due to a bypass technique involving slashes and dots. This security concern has been fixed in the subsequent versions of the product. Detection of such vulnerabilities is integral in maintaining the integrity and confidentiality of sensitive information.

Technical details suggest that this vulnerability arises because certain files in the project root, which should be inaccessible, can potentially be retrieved by bypassing the deny patterns. Specifically, files that match patterns under the 'server.fs.deny' configuration can be inadvertently exposed. Manipulating file requests to include combinations of slash and dot (/.), bypasses the server's denial mechanisms for accessing files like environment (.env) and certificate files (.crt, .pem). The exposure vector exploits this misconfiguration to send unauthorized file access requests and receive data back.

If exploited by malicious individuals, this vulnerability can lead to unauthorized information retrieval, potentially exposing sensitive data like environment variables, which may include secrets and other confidential configuration data. The exposure of such data could facilitate further attacks, like compromising other systems using leaked credentials or sensitive data found in the files. Organizations might face reputational damage, financial loss, and legal implications in case of a data breach.

REFERENCES

• https://github.com/vitejs/vite/security/advisories/GHSA-859w-5945-r5v3
• https://nvd.nist.gov/vuln/detail/CVE-2025-46565