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Incomplete List of Disallowed Inputs

CVE-2025-67716

Medium
5.7/10

Summary

The Auth0 Next.js SDK is a library for implementing user authentication in Next.js applications. Versions from 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.

  • HIGH
  • NETWORK
  • HIGH
  • UNCHANGED
  • REQUIRED
  • HIGH
  • HIGH
  • NONE

CWE-184 - Incomplete List of Disallowed Inputs

The product implements a protection mechanism that relies on a list of inputs (or properties of inputs) that are not allowed by policy or otherwise require other action to neutralize before additional processing takes place, but the list is incomplete, leading to resultant weaknesses.

References

Advisory Timeline

  • Published