Cloud Vulnerability DB
An open project to list all known cloud vulnerabilities and Cloud Service Provider security issues
Vulnerability DatabaseCVE-2025-48947
CVE-2025-48947:
JavaScript vulnerability analysis and mitigation
Overview
The Auth0 Next.js SDK, a library for implementing user authentication in Next.js applications, contains a vulnerability tracked as CVE-2025-48947. The flaw affects versions 4.0.1 through 4.6.0, where __session cookies set by auth0.middleware may be cached by CDNs due to missing Cache-Control headers. With over 286,000 weekly downloads, this vulnerability has significant reach across the Next.js developer ecosystem (Security Online).
Technical details
The vulnerability is rated with a CVSS score of 7.7 (High) and requires three specific preconditions to be exploitable: using the NextJS-Auth0 SDK between versions 4.0.1 and 4.6.0, having an application served through a CDN or edge network that caches Set-Cookie headers, and missing proper Cache-Control settings for sensitive responses (GitHub Advisory).
Impact
The vulnerability could allow cached session cookies to be mistakenly served to multiple users under certain conditions, violating session integrity and potentially allowing unauthorized access to user accounts (Security Online).
Mitigation and workarounds
Users should upgrade to version 4.6.1 of @auth0/nextjs-auth0 immediately to receive the security patch (Security Online).
Additional resources
Source: This report was generated using AI
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