CVE-2025-29927

CRITICAL EPSS 99.9%
Published Mar 21, 20251y ago · Modified Jun 17, 20261w ago
9.1 CVSS 3.1
Critical
Find Similar
Published Mar 21, 2025 1y ago
Last Modified Jun 17, 2026 1w ago

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 Details

Base Score
9.1
Exploitability
3.9
Impact
5.2
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability None

Threat Intelligence

EPSS Exploit Probability
99.9% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 2

CWE-285
CWE-863 Incorrect Authorization Authorization

Affected Products 4

VendorProductVersionRange
vercelnext.js*≥11.1.4  –  <12.3.5
vercelnext.js*≥13.0.0  –  <13.5.9
vercelnext.js*≥14.0.0  –  <14.2.25
vercelnext.js*≥15.0.0  –  <15.2.3

References 8

  • openwall.com http://www.openwall.com/lists/oss-security/2025/03/23/3
    Mailing ListThird Party Advisory
  • openwall.com http://www.openwall.com/lists/oss-security/2025/03/23/4
    Mailing List
  • github.com https://github.com/vercel/next.js/commit/52a078da3884efe6501613c7834a3d02a91676d2
    Patch
  • github.com https://github.com/vercel/next.js/commit/5fd3ae8f8542677c6294f32d18022731eab6fe48
    Patch
  • github.com https://github.com/vercel/next.js/releases/tag/v12.3.5
    Release Notes
  • github.com https://github.com/vercel/next.js/releases/tag/v13.5.9
    Release Notes
  • github.com https://github.com/vercel/next.js/security/advisories/GHSA-f82v-jwr5-mffw
    Vendor Advisory
  • security.netapp.com https://security.netapp.com/advisory/ntap-20250328-0002/
    Third Party Advisory

Remediation

  • github.com https://github.com/vercel/next.js/commit/52a078da3884efe6501613c7834a3d02a91676d2
    Patch
  • github.com https://github.com/vercel/next.js/commit/5fd3ae8f8542677c6294f32d18022731eab6fe48
    Patch