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CVE-2021-43803

Good to know:

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Date: December 9, 2021

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.

Language: JS

Severity Score

Related Resources (9)

https://github.com/vercel/next.js/releases/tag/v11.1.3
https://github.com/vercel/next.js/releases/v12.0.5
https://github.com/vercel/next.js/security/advisories/GHSA-25mp-g6fv-mqxx
https://github.com/vercel/next.js
https://github.com/vercel/next.js/commit/6d98b4fb4315dec1badecf0e9bdc212a4272b264
https://github.com/vercel/next.js/pull/32080
https://security.alpinelinux.org/vuln/CVE-2021-43803
https://nvd.nist.gov/vuln/detail/CVE-2021-43803
https://www.mend.io/vulnerability-database/CVE-2021-43803

Severity Score

Weakness Type (CWE)

Improper Input Validation

CWE-20

Insufficient Information

NVD-CWE-noinfo

Top Fix

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Upgrade Version

Upgrade to version next - 12.0.5;next - 11.1.3

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): MEDIUM
Authentication (AU): NONE
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): PARTIAL
Additional information:

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