Description
The Auth0 Next.js SDK is a library for implementing user authentication in Next.js applications. Versions 4.9.0 through 4.12.1 contain an input-validation flaw in the returnTo parameter, which could allow attackers to inject unintended OAuth query parameters into the Auth0 authorization request. Successful exploitation may result in tokens being issued with unintended parameters. This issue is fixed in version 4.13.0.
Details
CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:N
Affected Packages
| Software | From version | Fixed in |
|---|---|---|
| @auth0/nextjs-auth0 | โ | โ |
| nextjs-auth0 | 4.9.0 | 4.12.1 |
References
Similar Threats
- Medium CVE-2026-40155
- Medium CVE-2025-67490
- High CVE-2025-48947
- Unknown CVE-2025-46344
- Unknown CVE-2021-43812
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