Vulnerability Description
Next.js is a React framework for building full-stack web applications. Starting in version 1.11.4 and prior to versions 12.3.5, 13.5.9, 14.2.25, and 15.2.3, it is possible to bypass authorization checks within a Next.js application, if the authorization check occurs in middleware. If patching to a safe version is infeasible, it is recommend that you prevent external user requests which contain the x-middleware-subrequest header from reaching your Next.js application. This vulnerability is fixed in 12.3.5, 13.5.9, 14.2.25, and 15.2.3.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Vercel | Next.Js | >= 11.1.4, < 12.3.5 |
Related Weaknesses (CWE)
References
- https://github.com/vercel/next.js/commit/52a078da3884efe6501613c7834a3d02a91676dPatch
- https://github.com/vercel/next.js/commit/5fd3ae8f8542677c6294f32d18022731eab6fe4Patch
- https://github.com/vercel/next.js/releases/tag/v12.3.5Release Notes
- https://github.com/vercel/next.js/releases/tag/v13.5.9Release Notes
- https://github.com/vercel/next.js/security/advisories/GHSA-f82v-jwr5-mffwVendor Advisory
- http://www.openwall.com/lists/oss-security/2025/03/23/3Mailing ListThird Party Advisory
- http://www.openwall.com/lists/oss-security/2025/03/23/4Mailing List
- https://security.netapp.com/advisory/ntap-20250328-0002/Third Party Advisory
FAQ
What is CVE-2025-29927?
CVE-2025-29927 is a vulnerability with a CVSS score of 9.1 (CRITICAL). Next.js is a React framework for building full-stack web applications. Starting in version 1.11.4 and prior to versions 12.3.5, 13.5.9, 14.2.25, and 15.2.3, it is possible to bypass authorization chec...
How severe is CVE-2025-29927?
CVE-2025-29927 has been rated CRITICAL with a CVSS base score of 9.1/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2025-29927?
Check the references section above for vendor advisories and patch information. Affected products include: Vercel Next.Js.