{"cve":"CVE-2021-43812","nvd":{"published":"2021-12-16T19:15:08.353","modified":"2026-06-17T04:11:29.333","status":"Modified","description":"The Auth0 Next.js SDK is a library for implementing user authentication in Next.js applications. Versions before 1.6.2 do not filter out certain returnTo parameter values from the login url, which expose the application to an open redirect vulnerability. Users are advised to upgrade as soon as possible. There are no known workarounds for this issue.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","score":6.1},"cwes":["CWE-601"],"references":["https://github.com/auth0/nextjs-auth0/commit/0bbd9f8a0c93af51f607f28633b5fb18c5e48ad6","https://github.com/auth0/nextjs-auth0/security/advisories/GHSA-2mqv-4j3r-vjvp","https://github.com/auth0/nextjs-auth0/commit/0bbd9f8a0c93af51f607f28633b5fb18c5e48ad6","https://github.com/auth0/nextjs-auth0/security/advisories/GHSA-2mqv-4j3r-vjvp"],"products":["auth0:nextjs-auth0"],"source":"nvd","synced_at":"2026-10-19T21:25:41.256909649+00:00"},"epss":{"cve":"CVE-2021-43812","score":0.00677,"percentile":0.52312,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-2mqv-4j3r-vjvp","url":"https://osv.dev/vulnerability/GHSA-2mqv-4j3r-vjvp","summary":"Open redirect in @auth0/nextjs-auth0","modified":"2026-07-08T06:28:49.665321049Z","packages":[{"ecosystem":"npm","name":"@auth0/nextjs-auth0","purl":"pkg:npm/%40auth0/nextjs-auth0","ranges":["<1.6.2"],"fixed":["1.6.2"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}