What is CVE-2025-67716?

CVE-2025-67716 is a medium-severity vulnerability in Auth0 Nextjs-Auth0, classified under Incomplete List of Disallowed Inputs. CVSS score: 5.7/10. Published 2025-12-11.

How severe is CVE-2025-67716?

Medium severity. CVSS v3 base score is 5.7 out of 10.

Vulnerability in Auth0 Nextjs-Auth0

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. Successful exploitation may result in tokens being issued with unintended parameters. This issue is fixed in version 4.13.0.

EPSS: 0.002 (14.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.7 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:N.

Affected products

Auth0 Nextjs-auth0 — versions >= 4.9.0, < 4.13.0

Weakness classification (CWE)

CWE-184 — Incomplete List of Disallowed Inputs

References

security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)
security-advisories@github.com (Patch, x_refsource_MISC)

Frequently asked questions

What is CVE-2025-67716?: CVE-2025-67716 is a medium-severity vulnerability in Auth0 Nextjs-Auth0, classified under Incomplete List of Disallowed Inputs. CVSS score: 5.7/10. Published 2025-12-11.
How severe is CVE-2025-67716?: Medium severity. CVSS v3 base score is 5.7 out of 10.