CVE-2022-21721 Information

Description

Next.js is a React framework. Starting with version 12.0.0 and prior to version 12.0.9 vulnerable code could allow a bad actor to trigger a denial of service attack for anyone using i18n functionality. In order to be affected by this CVE one must use next start or a custom server and the built-in i18n support. Deployments on Vercel along with similar environments where invalid requests are filtered before reaching Next.js are not affected. A patch has been released next@12.0.9 that mitigates this issue. As a workaround one may ensure /$locale/_next/ is blocked from reaching the Next.js instance until it becomes feasible to upgrade.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Reference

https://github.com/vercel/next.js/pull/33503 https://github.com/vercel/next.js/security/advisories/GHSA-wr66-vrwm-5g5x https://github.com/vercel/next.js/releases/tag/v12.0.9

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

7.5