Reflected XSS from the callback handler's error query parameter

中 6.1CVE-2021-32702 · GHSA-954c-jjx6-cxv7 · 25/06/2021 公開 · 17/06/2026 更新

要点

CVE-2021-32702 は nextjs-auth0 (auth0), @auth0/nextjs-auth0 に影響する深刻度「中」 (CVSS 6.1) の脆弱性です。
今後30日間に悪用される確率（EPSS）：1.4%（全脆弱性の 72.6% より高い）。
対処：1.4.2 以降に更新してください。

パッケージ	影響を受けるバージョン	修正済みバージョン
nextjs-auth0 auth0	`< 1.4.2`	`1.4.2`
@auth0/nextjs-auth0 npm	`< 1.4.2`	`1.4.2`

概要

Overview

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.

Am I affected?

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.

How to fix that?

Upgrade to version 1.4.2.

Will this update impact my users?

The fix adds basic HTML escaping to the error message and it should not impact your users.

Credit

https://github.com/inian https://github.com/git-ishanpatel

NVD の説明

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.