{"answers":{"affected":"2 open source packages ship an affected version, including @auth0/nextjs-auth0. It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-43812 in the wild and no public exploit code.","fix":"Upgrade @auth0/nextjs-auth0 to 1.6.2 or later.","what":"CVE-2021-43812 is a medium-severity vulnerability in nextjs-auth0, published on 16 Dec 2021. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-43812 and fix it if it is affected.\n\nWhat it is: CVE-2021-43812 is a medium-severity vulnerability in nextjs-auth0, published on 16 Dec 2021. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2021-43812 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- @auth0/nextjs-auth0 (npm): affected all versions; fixed in 1.6.2\n- @auth0/nextjs-auth0 (npm): affected all versions; fixed in 1.6.2\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2021-43812/ (Markdown: https://insights.sbomify.com/CVE-2021-43812/index.md)","id":"CVE-2021-43812","markdown":"https://insights.sbomify.com/CVE-2021-43812/index.md","name":"CVE-2021-43812","record":{"aliases":["GHSA-2mqv-4j3r-vjvp"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"Next.js Auth0 SDK","requires_auth":"low_privilege","summary":"An open redirect vulnerability in the Auth0 Next.js SDK allows attackers to redirect users to malicious sites via the returnTo parameter.","user_interaction":"not_required","vuln_class":"open_redirect"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"nextjs-auth0","vendor":"auth0"}],"cvss":{"score":6.4,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-601","name":"URL Redirection to Untrusted Site"}],"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.","ecosystems":["npm"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"Open redirect in nextjs-auth0","id":"CVE-2021-43812","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":"open_redirect","year":"2021"},"n_packages":2,"n_references":2,"next":{"headline":"Directory Traversal in Grafana","id":"CVE-2021-43813"},"packages":[{"ecosystem":"npm","fixed":["1.6.2"],"introduced":["0"],"last_affected":[],"package":"@auth0/nextjs-auth0","purl":null,"source":"GHSA-2mqv-4j3r-vjvp"},{"ecosystem":"npm","fixed":["1.6.2"],"introduced":["0"],"last_affected":[],"package":"@auth0/nextjs-auth0","purl":"pkg:npm/%40auth0/nextjs-auth0","source":"GHSA-2mqv-4j3r-vjvp"}],"prev":{"headline":"Code injection via unsafe YAML loading","id":"CVE-2021-43811"},"products":["nextjs-auth0"],"published":"2021-12-16","related":[{"cvss_score":8,"headline":"Reflected XSS from the callback handler's error query parameter","id":"CVE-2021-32702","kev_date_added":null,"published":"2021-06-25"},{"cvss_score":5.7,"headline":"Auth0 Next.js SDK has Improper Validation of Query Parameters","id":"CVE-2025-67716","kev_date_added":null,"published":"2025-12-11"},{"cvss_score":5.4,"headline":"Auth0 Next.js SDK has Improper Proxy Cache Lookup","id":"CVE-2026-40155","kev_date_added":null,"published":"2026-04-17"},{"cvss_score":5.4,"headline":"Auth0 Next.js SDK has Improper Request Caching Lookup","id":"CVE-2025-67490","kev_date_added":null,"published":"2025-12-10"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2024-08-04","vendors":["auth0"]},"summary":"An open redirect vulnerability in the Auth0 Next.js SDK allows attackers to redirect users to malicious sites via the returnTo parameter.","url":"https://insights.sbomify.com/CVE-2021-43812/"}