CVE-2024-51479: vercel next.js Improper Authorization

Vulnerability summary

CVE-2024-51479 is a high (CVSS 7.5) Improper Authorization vulnerability in vercel next.js. EPSS estimates a 4.00% chance of exploitation in the next 30 days, higher than 90.4% of scored vulnerabilities.

Timeline

1. 17-12-2024
   PublishedVulnerability first disclosed.
2. 17-12-2024
   Last modifiedVulnerability information updated.

Description

Next.js is a React framework for building full-stack web applications. In affected versions if a Next.js application is performing authorization in middleware based on pathname, it was possible for this authorization to be bypassed for pages directly under the application's root directory. For example: * [Not affected] `https://example.com/` * [Affected] `https://example.com/foo` * [Not affected] `https://example.com/foo/bar`. This issue is patched in Next.js `14.2.15` and later. If your Next.js application is hosted on Vercel, this vulnerability has been automatically mitigated, regardless of Next.js version. There are no official workarounds for this vulnerability.

• CWE-285Improper AuthorizationThe product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action.
• CWE-863Incorrect AuthorizationThe product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.