---
cve: "CVE-2025-29927"
severity: "CRITICAL"
cvss: 9.1
epss: "99.3%"
vendor: "vercel"
kev: false
exploited: false
published: "2025-03-21 15:15:42"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-09-04T07:21:55+02:00"
---

# CVE-2025-29927

> 9.1 CRITICAL · 🧪 PoC

## Beschreibung

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-Vektor

```
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Hoch | bad |
| I Integrität | Hoch | bad |
| A Verfügbarkeit | Keine | good |

## Exploit-Evidenz

- [EDB-52124 — Next.js Middleware 15.2.2 -  Authorization Bypass](https://www.exploit-db.com/exploits/52124)

## Patch verfügbar (OSV)

- 6687ab55a362f1fe8cb15a76640cc87ff90d15f2 (Commit)
- 422223e929723dfe7a19f3efe22e38929e9fae79 (Commit)

## Referenzen

- <https://github.com/vercel/next.js/security/advisories/GHSA-f82v-jwr5-mffw>
- <https://github.com/vercel/next.js/commit/52a078da3884efe6501613c7834a3d02a91676d2>
- <https://github.com/vercel/next.js/commit/5fd3ae8f8542677c6294f32d18022731eab6fe48>
- <https://github.com/vercel/next.js/releases/tag/v12.3.5>
- <https://github.com/vercel/next.js/releases/tag/v13.5.9>
- <http://www.openwall.com/lists/oss-security/2025/03/23/3>
- <http://www.openwall.com/lists/oss-security/2025/03/23/4>
- <https://security.netapp.com/advisory/ntap-20250328-0002/>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2025-29927) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_