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
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.010 (62.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 62nd percentile — 62.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.012 · newest: 0.010 · change: -0.002
Affected products
- Vercel Next.js — versions < 11.1.0
Weakness classification (CWE)
References
- github.com/vercel/next.js/security/advisories/GHSA-vxf5-wxwp-m7g9 (Third Party Advisory)
- github.com/vercel/next.js/releases/tag/v11.1.0 (Third Party Advisory, 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.