CVE-2025-67716
Auth0 Next.js SDK has Improper Validation of Query Parameters
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- High
- User interaction
- Required
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
Auth0 Next.js SDK has Improper Validation of Query Parameters
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.
- Record
CVE-2025-67716- CVSS 3.1
- 5.7 Medium
CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:N - Weakness
- CWE-184
- Updated
- 2026-11-02
EUVDEUVD-2025-202629
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.
- Record
EUVD-2025-202629- CVSS 3.1
- 5.7 Medium
CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:N - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-mr6f-h57v-rpj5
Improper Validation of Query Parameters in Auth0 Next.js SDK
Description
An input-validation flaw in the returnTo parameter in the Auth0 Next.js SDK 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
Am I Affected?
You are affected if you meet the following preconditions:
- Applications using the auth0/nextjs-auth0 SDK version prior to 4.13.0
Affected product and versions
Auth0/nextjs-auth0 versions >= 4.9.0 and < 4.13.0
Resolution
Upgrade Auth0/nextjs-auth0 version to v4.13.0
Acknowledgements
Okta would like to thank Joshua Rogers (MegaManSec) for their discovery and responsible disclosure.
- Record
GHSA-mr6f-h57v-rpj5- CVSS 3.1
- 3.7 Low
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N - Weakness
- CWE-184
- Updated
- 2026-11-02
NVD
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.
- Record
CVE-2025-67716- CVSS 3.1
- 5.7 Medium
CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:N - Weakness
- CWE-184
- Updated
- 2026-11-02
OSV
Auth0 Next.js SDK has Improper Validation of Query Parameters
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.
- Record
CVE-2025-67716- CVSS 3.1
- 5.7 Medium
CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:N - Weakness
- CWE-184
- Updated
- 2026-11-02
OSVGHSA-mr6f-h57v-rpj5
Improper Validation of Query Parameters in Auth0 Next.js SDK
Description
An input-validation flaw in the returnTo parameter in the Auth0 Next.js SDK 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
Am I Affected?
You are affected if you meet the following preconditions:
- Applications using the auth0/nextjs-auth0 SDK version prior to 4.13.0
Affected product and versions
Auth0/nextjs-auth0 versions >= 4.9.0 and < 4.13.0
Resolution
Upgrade Auth0/nextjs-auth0 version to v4.13.0
Acknowledgements
Okta would like to thank Joshua Rogers (MegaManSec) for their discovery and responsible disclosure.
- Record
GHSA-mr6f-h57v-rpj5- CVSS 3.1
- 3.7 Low
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N - Weakness
- CWE-184
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
@auth0/nextjs-auth0npm |
4.9.0 up to 4.13.0 | 4.13.0 |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2025-67716 is a medium vulnerability (CVSS 5.7) in Auth0 Nextjs-auth0, published December 10, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.26%, the 18th percentile. Fixed in @auth0/nextjs-auth0 4.13.0.
References
github.com/auth0/nextjs-auth0/security/advisories/GHSA-mr6f-h57v-rpj5
nvd.nist.gov/vuln/detail/CVE-2025-67716