Improper authorization in Next.js - CVE-2025-29927
Published: March 21, 2025 / Updated: January 4, 2026
Vulnerability identifier: #VU105939
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:P/U:Amber
CVE-ID: CVE-2025-29927
CWE-ID: CWE-285
Exploitation vector: Remote access
Exploit availability:
Public exploit is available
Vendor: vercel
Affected software:
Next.js
Next.js
Detailed vulnerability description
The vulnerability allows a remote attacker to bypass authorization process.
The vulnerability exists due to missing authorization checks. A remote attacker can bypass authorization mechanism and compromise the affected application.
How to mitigate CVE-2025-29927
Install updates from vendor's website.