CVE-2021-32641: AUTH0 Lock

Medium severity, CVSS 6.1. EPSS: 1.5% chance of exploitation in the next 30 days.

auth0-lock is Auth0's signin solution. Versions of nauth0-lock before and including `11.30.0` are vulnerable to reflected XSS. An attacker can execute arbitrary code when the library's `flashMessage` feature is utilized and user input or data from URL parameters is incorporated into the `flashMessage` or the library's `languageDictionary` feature is utilized and user input or data from URL parameters is incorporated into the `languageDictionary`. The vulnerability is patched in version 11.30.1.

Affected products

• AUTH0 Lock: before 11.30.1 (fixed in 11.30.1)

Published 2021-06-04. Last modified 2026-06-17.