Vulnerability · Published Jun 4, 2025 · Assigned by GitHub_M

CVE-2025-48947NextJS-Auth0 SDK Vulnerable to CDN Caching of Session Cookies

High 7.7

In plain English

A high-severity security flaw in nextjs-auth0 from auth0. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 38% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 4.0)7.7High

Exploit odds (30 days)0.4%top 62.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

The Auth0 Next.js SDK is a library for implementing user authentication in Next.js applications. In Auth0 Next.js SDK versions 4.0.1 through 4.6.0, `__session` cookies set by auth0.middleware may be cached by CDNs due to missing Cache-Control headers. Three preconditions must be met in order for someone to be affected by the vulnerability: Applications using the NextJS-Auth0 SDK, versions between 4.0.1 to 4.6.0, applications using CDN or edge caching that caches responses with the Set-Cookie header, and if the Cache-Control header is not properly set for sensitive responses. Users should upgrade auth0/nextjs-auth0 to v4.6.1 to receive a patch.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
npm	@auth0/nextjs-auth0	4.6.1	GHSA-f3fg-mf2q-fj3f

Affected products (as reported)

Vendor	Product	Versions
auth0	nextjs-auth0	>= 4.0.1, < 4.6.1

Weakness: CWE-525 · Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L

References

https://github.com/auth0/nextjs-auth0/security/advisories/GHSA-f3fg-mf2q-fj3f x_refsource_CONFIRM