CVE-2021-32702
8.0 · HIGHOverview
CVE-2021-32702 is a high-severity vulnerability affecting auth0 nextjs-auth0. It was published on June 25, 2021 and has a CVSS 3.1 base score of 8.0 (HIGH).
This vulnerability has a CVSS 3.1 base score of 8.0, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
The Auth0 Next.js SDK is a library for implementing user authentication in Next.js applications. Versions before and including `1.4.1` are vulnerable to reflected XSS. An attacker can execute arbitrary code by providing an XSS payload in the `error` query parameter which is then processed by the callback handler as an error message. You are affected by this vulnerability if you are using `@auth0/nextjs-auth0` version `1.4.1` or lower **unless** you are using custom error handling that does not return the error message in an HTML response. Upgrade to version `1.4.1` to resolve. The fix adds basic HTML escaping to the error message and it should not impact your users.
Remediation
Check the references section for vendor advisories and patches from auth0. Update nextjs-auth0 to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| auth0 | nextjs-auth0 | >= 0, < 1.4.2 | Affected |
References
Frequently Asked Questions
What is CVE-2021-32702?
CVE-2021-32702 is a high-severity vulnerability affecting auth0 nextjs-auth0. It was published on June 25, 2021 and has a CVSS 3.1 base score of 8.0 (HIGH).
How severe is CVE-2021-32702?
This vulnerability has a CVSS 3.1 base score of 8.0, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2021-32702?
Check the references section for vendor advisories and patches from auth0. Update nextjs-auth0 to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2021-32702?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-32702 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
Automated penetration testing that runs continuously, not just quarterly.
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