Express CVE-2024-9266 Open Redirect Vulnerability Advisory

From this webpage screenshot, the following key vulnerability information can be obtained: 1. Vulnerability ID: CVE-2024-9266 2. Vulnerability Type: URL Redirect/Open Redirect 3. Affected Component: Express 4. Affected Version Range: >=3.4.5 =3.4.5 < 4.0.0 11. GitHub Repository: https://github.com/expressjs/express 12. Published Package: https://www.npmjs.com/package/express 13. Package Manager: npm 14. Vulnerability Description: The method in the object of Express is vulnerable to open redirect attacks when the path starts with double slashes , the relative path starts with , and the header is set to user-controlled input. 15. Reproduction Steps: - In Express application code, create a route that redirects users to a location provided via URL parameters. - In the browser, access the Express application route with the following query parameter: - The browser should redirect to . This can also be observed by inspecting header details in the browser's developer tools. 16. Proof of Concept: A complete reproduction example similar to the above code is provided. 17. Credit: Matvejs Mascenko (discoverer) 18. Mitigation Measures: - Migrate to a newer version of Express. - Apply your own patch. - Leverage commercial support partners, such as HeroDevs, to obtain security support after EOL.

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Express CVE-2024-9266 Open Redirect Vulnerability Advisory