CVE-2022-29172 is a medium-severity (CVSS 6.1) Cross-site Scripting (XSS) vulnerability in auth0-lock. A fix is available for auth0-lock — see the affected versions and patch details below.
HTML injection with additional signup fields
Exploitation Status
No confirmed exploitation observed yet
- CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.
Exploitation and automatability from CISA’s SSVC triage for CVE-2022-29172.
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
Where this sits among everything scored
Real-World Exposure
How broadly this vulnerability is actually deployed: weekly install volume shows current usage, and reverse-dependency count shows how many other packages break if it stays unpatched.
auth0-locknpmDescription
Overview
In versions before and including 11.32.2, when the “additional signup fields” feature is configured, a malicious actor can inject invalidated HTML code into these additional fields, which is then stored in the service user_metdata payload (using the name property).
Verification emails, when applicable, are generated using this metadata. It is therefor possible for an actor to craft a malicious link by injecting HTML, which is then rendered as the recipient's name within the delivered email template.
Am I affected?
You are impacted by this vulnerability if you are using auth0-lock version 11.32.2 or lower and are using the “additional signup fields” feature in your application.
How to fix that?
Upgrade to version 11.33.0.
Will this update impact my users?
Additional signup fields that have been added to the signup tab on Lock will have HTML tags stripped from user input from version 11.33.0 onwards. The user will not receive any validation warning or feedback, but backend data will no longer include HTML.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 📦npm | auth0-lock | all versions | 11.33.0npm install auth0-lock@11.33.0 |
Affected Products
lockauth0Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for auth0-lock, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update auth0-lock to 11.33.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2022-29172 is resolved across your whole dependency graph.
Workarounds
Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page.
Frequently Asked Questions
Is CVE-2022-29172 in your dependencies?
Find it across npm, including transitive dependencies.