Information disclosure in Next.js - CVE-2025-30218
Published: April 3, 2025
Vulnerability identifier: #VU106922
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2025-30218
CWE-ID: CWE-200
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: vercel
Affected software:
Next.js
Next.js
Detailed vulnerability description
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to software may leak the "x-middleware-subrequest-id" to a third party. A remote attacker with control over the third-party server can obtain the header value and use it to bypass authentication.
How to mitigate CVE-2025-30218
Install updates from vendor's website.