CVE-2025-67716

Auth0 Next.js SDK has Improper Validation of Query Parameters

CVSS 5.7 MEDIUMEPSS 0.2%CWE-184

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.

CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:N

Affected products

auth0 · nextjs-auth0

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References

https://github.com/auth0/nextjs-auth0/commit/35eb321de3345ccf23e8c0d6f66c9f2f2f57d26c https://github.com/auth0/nextjs-auth0/security/advisories/GHSA-mr6f-h57v-rpj5