CVE-2023-49293 Scanner

Vite dev server is widely used by developers around the world as a tool for building and serving web applications. It is primarily used by frontend developers who are working with projects using modern JavaScript frameworks like Vue.js, React, or Angular. The dev server provides fast and efficient service, allowing for a smooth development experience with hot module replacement and other useful features. It is used in development environments to quickly see changes in code reflected in the browser. Being open-source, it is favored for its flexibility and ease of customization to fit various development needs. Vite's popularity in the developer community is due to its performance enhancements over traditional build tools.

A Cross-Site Scripting (XSS) vulnerability allows attackers to inject malicious scripts into web pages viewed by other users. This particular vulnerability exists in Vite's dev server when configured with `appType: 'custom'`. The vulnerability is primarily due to improperly sanitizing URL requests that are manually invoked using `server.transformIndexHtml`. When exploited, an attacker can craft a URL that injects malicious scripts. This vulnerability exposes users to potential data theft, session hijacking, or other unauthorized actions executed via the injected scripts. It is critical that configurations follow secure practices to prevent such vulnerabilities.

The specific XSS vulnerability affects Vite dev server configurations that manually execute `server.transformIndexHtml` with unmodified request URLs. The vulnerability allows injected scripts via the URL, which can execute in the browser context if an inline module script exists in the HTML being served. Attackers exploiting this could craft specially constructed URLs that perform malicious actions. Typical payloads might involve JavaScript alert executions or more harmful scripts accessing sensitive browsing data. Developers must be aware of secure coding practices and avoid exposing such endpoints to potential manipulation.

If exploited, this vulnerability could lead to a range of harmful effects such as unauthorized access to user sessions, theft of sensitive browser data, including cookies and session tokens, and injection of further harmful scripts. It undermines the security posture by making client-side attacks feasible. Developers relying on vulnerable versions may inadvertently expose their test or development environments to exploitation. Though typically a low-risk environment, the implications for sensitive data exposure or application abuse still pose significant security concerns.

REFERENCES

• https://github.com/vitejs/vite/security/advisories/GHSA-92r3-m2mg-pj97
• https://nvd.nist.gov/vuln/detail/CVE-2023-49293