Vulnerability Description
Next.js is a React framework for building full-stack web applications. Versions prior to 14.2.24 and 15.1.6 have a race-condition vulnerability. This issue only affects the Pages Router under certain misconfigurations, causing normal endpoints to serve `pageProps` data instead of standard HTML. This issue was patched in versions 15.1.6 and 14.2.24 by stripping the `x-now-route-matches` header from incoming requests. Applications hosted on Vercel's platform are not affected by this issue, as the platform does not cache responses based solely on `200 OK` status without explicit `cache-control` headers. Those who self-host Next.js deployments and are unable to upgrade immediately can mitigate this vulnerability by stripping the `x-now-route-matches` header from all incoming requests at the content development network and setting `cache-control: no-store` for all responses under risk. The maintainers of Next.js strongly recommend only caching responses with explicit cache-control headers.
CVSS Score
LOW
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Vercel | Next.Js | < 14.2.24 |
Related Weaknesses (CWE)
References
- https://github.com/vercel/next.js/security/advisories/GHSA-qpjv-v59x-3qc4Vendor Advisory
- https://vercel.com/changelog/cve-2025-32421Vendor Advisory
FAQ
What is CVE-2025-32421?
CVE-2025-32421 is a vulnerability with a CVSS score of 3.7 (LOW). Next.js is a React framework for building full-stack web applications. Versions prior to 14.2.24 and 15.1.6 have a race-condition vulnerability. This issue only affects the Pages Router under certain ...
How severe is CVE-2025-32421?
CVE-2025-32421 has been rated LOW with a CVSS base score of 3.7/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-32421?
Check the references section above for vendor advisories and patch information. Affected products include: Vercel Next.Js.