9.1 CriticalCWE-285
CVE-2025-29927
vercel next.js vulnerability
vercelnext.js
Status
- Not in CISA KEV
- Vendor fix available
Exploit probabilityEPSSchecked 22 Oct
99.2%probability of exploitation in the next 30 days
Higher than 100% of scored CVEs
SeverityCVSS
9.1Critical
Description NVD
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.
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