CVE-2022-21721
What it is
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.
At a glance
- Exploitability
- Can be exploited over the network without logging in. High risk of service disruption.
- Exploit odds
- 2.2% chance of exploitation in the next 30 days (EPSS).
- Fix
- A patch, advisory or fixed version is referenced. Upgrade or apply it.
Timeline
- PublishedDisclosed publicly on CVE.org and NVD
- Last updatedMost recent change to the record
Why it ranks here
- Exploited in the wild: no, CISA does not list it.
- Exploit odds: 2.2% in the next 30 days (EPSS).
- Severity: 5.9 MEDIUM (CVSS).
- Fix: a patch or advisory is linked.
Details
- Published
- Last modified
- Exploit probability
- 2.2% · EPSS, next 30 days
- Record status
- Modified
Affected
- Vercel next.js < 12.0.9
Attack profile CVSS 3.1 · 5.9
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Raw vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Is it in your code?
Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.
Read https://cve-list.com/agent/cve/CVE-2022-21721.md and follow it. Check whether this project is affected by CVE-2022-21721. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.
Fix and advisories
- https://github.com/vercel/next.js/pull/33503
- https://github.com/vercel/next.js/releases/tag/v12.0.9
- https://github.com/vercel/next.js/security/advisories/GHSA-wr66-vrwm-5g5x
- https://github.com/vercel/next.js/pull/33503
- https://github.com/vercel/next.js/releases/tag/v12.0.9
- https://github.com/vercel/next.js/security/advisories/GHSA-wr66-vrwm-5g5x
References
- https://github.com/vercel/next.js/pull/33503
- https://github.com/vercel/next.js/releases/tag/v12.0.9
- https://github.com/vercel/next.js/security/advisories/GHSA-wr66-vrwm-5g5x
- https://github.com/vercel/next.js/pull/33503
- https://github.com/vercel/next.js/releases/tag/v12.0.9
- https://github.com/vercel/next.js/security/advisories/GHSA-wr66-vrwm-5g5x