Vulnerability 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, `[email protected]`, 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 Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Vercel | Next.Js | >= 12.0.0, < 12.0.9 |
References
- https://github.com/vercel/next.js/pull/33503PatchThird Party Advisory
- https://github.com/vercel/next.js/releases/tag/v12.0.9Release NotesThird Party Advisory
- https://github.com/vercel/next.js/security/advisories/GHSA-wr66-vrwm-5g5xThird Party Advisory
- https://github.com/vercel/next.js/pull/33503PatchThird Party Advisory
- https://github.com/vercel/next.js/releases/tag/v12.0.9Release NotesThird Party Advisory
- https://github.com/vercel/next.js/security/advisories/GHSA-wr66-vrwm-5g5xThird Party Advisory
FAQ
What is CVE-2022-21721?
CVE-2022-21721 is a vulnerability with a CVSS score of 5.9 (MEDIUM). 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 functionalit...
How severe is CVE-2022-21721?
CVE-2022-21721 has been rated MEDIUM with a CVSS base score of 5.9/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2022-21721?
Check the references section above for vendor advisories and patch information. Affected products include: Vercel Next.Js.