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    CVE-2021-43812

    The Auth0 Next.js SDK is a library for implementing user authentication in Next.js applications. Versions before 1.6.2 do not filter out certain returnTo parameter values from the login url, which expose the application to an open redirect vulnerability. Users are advised to upgrade as soon as possible. There are no known workarounds for this issue.

    Published:Dec 16, 2021
    Last Modified:Nov 21, 2024
    EPS:Dec 16, 2021
    EPSS Score:0.00195
    CVSS Score:6.4

    Affected Products

    Vendor
    Auth0
    Product
    Nextjs-auth0

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-178 Cross-Site Flashing

    Related CVEs

    CVE-2026-40155 (CVSS 5.4) — The Auth0 Next.js SDK is a library for implementing user authentication in Next.js applications. In versions 4…
    CVE-2025-67716 (CVSS 5.7) — The Auth0 Next.js SDK is a library for implementing user authentication in Next.js applications. Versions 4.9.…
    CVE-2025-67490 (CVSS 5.4) — The Auth0 Next.js SDK is a library for implementing user authentication in Next.js applications. When using ve…
    CVE-2025-48947 (CVSS 7.7) — The Auth0 Next.js SDK is a library for implementing user authentication in Next.js applications. In Auth0 Next…
    CVE-2025-46344 (CVSS 4.9) — The Auth0 Next.js SDK is a library for implementing user authentication in Next.js applications. Versions star…
    CVE-2021-32702 (CVSS 8) — The Auth0 Next.js SDK is a library for implementing user authentication in Next.js applications. Versions befo…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High