OAuth Parameter Injection

Auth0 Next.js is vulnerable to OAuth Parameter Injection. The vulnerability is due to insufficient validation of the returnTo parameter, where attacker-controlled input can inject unintended OAuth query parameters into the authorization request, potentially resulting in tokens being issued with...

CVE-2025-67716

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...

PT-2025-50563

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...