How severe is CVE-2021-43803?

This vulnerability has a severity rating of HIGH with a CVSS score of 7.5 out of 10.

What type of vulnerability is CVE-2021-43803?

This is classified as CWE-20, which is a common weakness in software security.

CVE-2021-43803

HIGH Year: 2021

CVSS v3 Score

7.5

High

CVSS v2 Score

4.3

Medium

Weakness Type

CWE-20

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Vulnerability Description

Next.js is a React framework. In versions of Next.js prior to 12.0.5 or 11.1.3, invalid or malformed URLs could lead to a server crash. In order to be affected by this issue, the deployment must use Next.js versions above 11.1.0 and below 12.0.5, Node.js above 15.0.0, and next start or a custom server. Deployments on Vercel are not affected, along with similar environments where invalid requests are filtered before reaching Next.js. Versions 12.0.5 and 11.1.3 contain patches for this issue.

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