Open Redirect in Vercel Next.js
CVE-2021-37699
Next.js is an open source website development framework to be used with the React library. In affected versions specially encoded paths could be used when pages/_error.js was statically generated allowing an open redirect to occur to an external site. In general, this redirect does not directly harm users although can allow for phishing attacks by redirecting to an attacker's domain from a trusted domain. We recommend everyone to upgrade regardless of whether you can reproduce the issue or not. The issue has been patched in release 11.1.0.
Vulnerability class: Open Redirect
EPSS: 0.012 (65.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:L/A:N.
Affected products
- Vercel Next.js — versions < 11.1.0
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Third Party Advisory)
- security-advisories@github.com (Third Party Advisory, x_refsource_MISC, Release Notes)
Frequently asked questions
- What is CVE-2021-37699?
- CVE-2021-37699 is a medium-severity vulnerability in Vercel Next.js, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 6.9/10. Published 2021-08-12.
- How severe is CVE-2021-37699?
- Medium severity. CVSS v3 base score is 6.9 out of 10.