CVE-2021-43803CWE-20

Unexpected server crash in Next.js

High · published December 9, 2021

CVSS v3.1
7.5
EPSS
47%
Percentile
98.8
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.47254 · 98.8th percentile
Weakness
CWE-20 · Improper Input Validation
Published
2021-12-09T23:50Z
EPSS history
Timeline
  • 09 DEC 23:50Z
    Unexpected server crash in Next.js
    cvelistv5