CVE-2021-43803
HIGH severity · CVSS 7.5 · Improper input validation
7.5CVSS HIGH
Summary
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.
Impact & exploitability
Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
Confidentiality impactNone
Integrity impactNone
Availability impactHigh
Exploit probability (EPSS)45%
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Recommendation
Apply the vendor fix promptly. Open any affected product above for its exact safe version.
Official patch: https://github.com/vercel/next.js/commit/6d98b4fb4315dec1badecf0e9bdc212a4272b264 ↗
Additional information
- NVD record
- https://github.com/vercel/next.js/commit/6d98b4fb4315dec1badecf0e9bdc212a4272b264Patch
- https://github.com/vercel/next.js/pull/32080Patch
- https://github.com/vercel/next.js/security/advisories/GHSA-25mp-g6fv-mqxxPatch
- https://github.com/vercel/next.js/releases/tag/v11.1.3Advisory
- https://github.com/vercel/next.js/releases/v12.0.5Advisory