CVE-2021-32702— Reflected XSS from the callback handler's error query parameter

Reflected XSS from the callback handler's error query parameter

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.

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N

在Web页面生成时对输入的转义处理不恰当(跨站脚本)

Auth0 跨站脚本漏洞

Auth0是是一个身份验证代理，支持社会和企业身份提供者，包括Active Directory、LDAP、谷歌Apps和Salesforce。 Auth0 Next.js SDK 存在跨站脚本漏洞，该漏洞源于1.4.1及之前版本容易受到反射XSS的影响。攻击者可利用该漏洞可以通过在error查询参数中提供XSS有效负载来执行任意代码，然后由回调处理程序将其作为错误消息处理。

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