CVE-2022-21721
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.15%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 2.15% probability · 81th percentile
- CISA KEV
- Not listed
- Affected
- vercel/next.js
- Source
- security-advisories@github.com
References
- https://github.com/vercel/next.js/pull/33503Patch, Third Party Advisory
- https://github.com/vercel/next.js/releases/tag/v12.0.9Release Notes, Third Party Advisory
- https://github.com/vercel/next.js/security/advisories/GHSA-wr66-vrwm-5g5xThird Party Advisory
- https://github.com/vercel/next.js/pull/33503Patch, Third Party Advisory
- https://github.com/vercel/next.js/releases/tag/v12.0.9Release Notes, Third Party Advisory
- https://github.com/vercel/next.js/security/advisories/GHSA-wr66-vrwm-5g5xThird Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.