CVE-2021-39178

XSS in Image Optimization API for Next.js versions between 10.0.0 and 11.1.0

Description

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.

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.61%
Third-Party Advisory github.com Third-Party Advisory github.com
Affected: vercel next.js
Published at:
Updated at:

References

Link Tags
https://github.com/vercel/next.js/security/advisories/GHSA-9gr3-7897-pp7m third party advisory patch
https://github.com/vercel/next.js/releases/tag/v11.1.1 release notes third party advisory patch

Frequently Asked Questions

What is the severity of CVE-2021-39178?
CVE-2021-39178 has been scored as a high severity vulnerability.
How to fix CVE-2021-39178?
To fix CVE-2021-39178, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-39178 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-39178 is being actively exploited. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-39178?
CVE-2021-39178 affects vercel next.js.
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