CVE-2025-29927

Description

Next.js is a React framework for building full-stack web applications. Prior to 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 14.2.25 and 15.2.3.

References

https://thehackernews.com/2025/03/cisa-flags-two-six-year-old-sitecore.html

https://www.securityweek.com/critical-next-js-vulnerability-in-hacker-crosshairs/

https://hackread.com/next-js-middleware-flaw-bypass-authorization/

https://www.bleepingcomputer.com/news/security/critical-flaw-in-nextjs-lets-hackers-bypass-authorization/

https://www.akamai.com/blog/security-research/2025/mar/march-authorization-bypass-critical-nextjs-detections-mitigations

https://thehackernews.com/2025/03/critical-nextjs-vulnerability-allows.html

https://cyberscoop.com/nextjs-critical-vulnerability-open-source-vercel/

https://nextjs.org/blog/cve-2025-29927

https://security.netapp.com/advisory/ntap-20250328-0002/

https://github.com/vercel/next.js/security/advisories/GHSA-f82v-jwr5-mffw

http://www.openwall.com/lists/oss-security/2025/03/23/4

http://www.openwall.com/lists/oss-security/2025/03/23/3

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3