How severe is CVE-2021-32641?

CVE-2021-32641 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-32641 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-32641?

CVE-2021-32641 affects Auth0 Lock. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-32641?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-32641 published?

CVE-2021-32641 was published on 2021-06-04 and last updated on 2026-06-17.

CVE-2021-32641

CVE-2021-32641 is a high-severity vulnerability in Auth0 Lock with a CVSS 3.x base score of 8.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: High (CVSS 3.x base score 8.1)
CVSS v2: 4.3
EPSS exploit prediction: 2% (72nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Auth0 Lock
Published: 2021-06-04
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2021-32641?: 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.
How severe is CVE-2021-32641?: CVE-2021-32641 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-32641 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-32641?: CVE-2021-32641 affects Auth0 Lock. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-32641?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-32641 published?: CVE-2021-32641 was published on 2021-06-04 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:auth0:lock:*:*:*:*:*:*:*:*

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CVE-2020-15119 — Medium (CVSS 6.4): In auth0-lock versions before and including 11.25.1, dangerouslySetInnerHTML is used to update the DOM. When…
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