cvedb.io
CVE-2021-39178
HIGH · CVSS 7.5
EPSS exploitation probability: 0%
Published 2021-08-31T00:15:07.203 · Last modified 2026-06-17T04:03:15.377

Summary

Next.js is a React framework. Versions of Next.js between 10.0.0 and 11.0.0 contain a cross-site scripting vulnerability. In order for an instance to be affected by the vulnerability, the `next.config.js` file must have `images.domains` array assigned and the image host assigned in `images.domains` must allow user-provided SVG. If the `next.config.js` file has `images.loader` assigned to something other than default or the instance is deployed on Vercel, the instance is not affected by the vulnerability. The vulnerability is patched in Next.js version 11.1.1.

Affected products

vercel — next.js

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.