XSS in Image Optimization API for Next.js versions between 10.0.0 and 11.1.0
CVE-2021-39178

7.5HIGH

Key Information:

Vendor
Vercel
Status
Next.js
Vendor
CVE Published:
31 August 2021

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 Version(s)

next.js >= 10.0.0, < 11.1.1

References

https://github.com/vercel/next.js/security/advisories/GHS...
x_refsource_CONFIRM
https://github.com/vercel/next.js/releases/tag/v11.1.1
x_refsource_MISC

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.