CVE-2021-32641 Explained : Impact and Mitigation

Reflected Cross-Site Scripting (XSS) vulnerability in Auth0's signin solution,

auth0-lock

versions before and including 11.30.0 allows attackers to execute arbitrary code via manipulated

flashMessage

or

languageDictionary

. The issue is patched in version 11.30.1.

Understanding CVE-2021-32641

This CVE involves a high-severity XSS vulnerability in Auth0's

auth0-lock

library.

What is CVE-2021-32641?

CVE-2021-32641 is a reflected Cross-Site Scripting vulnerability that affects

auth0-lock

versions before and including 11.30.0. Attackers can exploit this issue by injecting malicious code in the

flashMessage

or

languageDictionary

features.

The Impact of CVE-2021-32641

The vulnerability has a CVSS base score of 8.1 (High) with significant impacts on confidentiality, integrity, and availability of the affected systems.

Technical Details of CVE-2021-32641

The technical details include the vulnerability description, affected systems and versions, and the exploitation mechanism.

Vulnerability Description

The vulnerability allows attackers to execute arbitrary code by manipulating user input or data from URL parameters through the

flashMessage

or

languageDictionary

features.

Affected Systems and Versions

Auth0's

auth0-lock

versions before and including 11.30.0 are affected by this vulnerability.

Exploitation Mechanism

Attackers exploit this vulnerability through the

flashMessage

or

languageDictionary

features to execute arbitrary code.

Mitigation and Prevention

Understanding the steps to mitigate and prevent this vulnerability is crucial.

Immediate Steps to Take

Users should update to version 11.30.1 to patch the vulnerability and prevent exploitation.

Long-Term Security Practices

Implement input validation mechanisms and avoid incorporating user input directly into features like

flashMessage

and

languageDictionary

.

Patching and Updates

Regularly monitor security advisories and update to the latest versions of

auth0-lock

to ensure protection against known vulnerabilities.