🛡️ CVE-2021-37699 — next

⚪ Unknown ✅ No Known Exploit CWE-601 OSV
N/A
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Open Redirect in Next.js

Next.js is an open source website development framework to be used with the React library. In affected versions specially encoded paths could be used when pages/_error.js was statically generated, allowing an open redirect to occur to an external site. In general, this redirect does not directly harm users although it can allow for phishing attacks by redirecting to an attacker's domain from a trusted domain.

Impact

  • Affected: Users of Next.js between 10.0.5 and 10.2.0
  • Affected: Users of Next.js between 11.0.0 and 11.0.1 using pages/_error.js without getInitialProps
  • Affected: Users of Next.js between 11.0.0 and 11.0.1 using pages/_error.js and next export
  • Not affected: Deployments on Vercel ([vercel.com](https://vercel.com)) are not affected
  • Not affected: Deployments with pages/404.js
  • Note that versions prior to 0.9.9 package next npm package hosted a different utility (0.4.1 being the latest version of that codebase), and this advisory does not apply to those versions.

We recommend upgrading to the latest version of Next.js to improve the overall security of your application.

Patches

https://github.com/vercel/next.js/releases/tag/v11.1.0

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is high, an attacker needs no privileges on the target. A user must be tricked into taking some action. The scope is changed, meaning a successful attack can affect components beyond the vulnerable one. Rated impact: confidentiality high, integrity low, availability none.

Weakness class

CVE-2021-37699 is classified as CWE-601: Open Redirect. A redirect target is taken from user input, so a trusted link can send the visitor to an attacker's site.

Affected software

CVE-2021-37699 is recorded against 1 package.

  • next

Timeline and source

Published on 12 August 2021 and last revised on 8 July 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

github.com (Web)
nvd.nist.gov (Advisory)
github.com (Package)
github.com (Web)

Details

Severity Unknown
CVSS Score N/A
CVSS Vector CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:L/A:N
CWE CWE-601
Public Exploit ✅ No
Source OSV
Published 2021-08-12
Updated 2026-08-12
Modified 2026-07-08
Fix URL N/A

Affected Packages

Software From version Fixed in
next — —

Similar Threats

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