# CVE-2021-38299: Improper Access Control in Webauthn Framework

Source: https://junglewise.ai/threats/cve-2021-38299-improper-access-control-in-webauthn-framework  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2021-09-29  
License: CC BY 4.0 with a link back

CVE-2021-38299 · Severity: low · CVSS 3.1 · Published 2021-09-29

Improper Access Control in Webauthn Framework

Technologies: [web-auth/webauthn-framework (Packagist)](https://junglewise.ai/threats/technologies/web-auth-webauthn-framework). Vendors: [Packagist](https://junglewise.ai/threats/vendors/packagist).

## Quick answers

**Is CVE-2021-38299 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2021-38299 being exploited in the wild.

**How severe is CVE-2021-38299?** Low severity, with a CVSS score of 3.1, published 29 September 2021.

**Which products and versions are affected?** web-auth/webauthn-framework (Packagist) ECOSYSTEM:introduced=3.3.0,fixed=3.3.4.

**Is there a fix for CVE-2021-38299?** Yes. web-auth/webauthn-framework (Packagist): upgrade to 3.3.4 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2021-38299?** Check whether you run web-auth/webauthn-framework (Packagist) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- web-auth/webauthn-framework (Packagist): upgrade to 3.3.4 or later

  ```sh
  composer require web-auth/webauthn-framework:^3.3.4
  ```


## Affected products

- web-auth/webauthn-framework (Packagist) ECOSYSTEM:introduced=3.3.0,fixed=3.3.4

## Identifiers

- CVE-2021-38299
- GHSA-6whf-q6p5-84wg

## Related threats

- [Webauthn has a User Verification Downgrade via Default-Open ClientOverridePolicy](https://junglewise.ai/threats/webauthn-has-a-user-verification-downgrade-via-default-open-b674f344)
- [Webauthn Framework: allowed_origins collapses URL-like origins to host-only values, bypassing exact origin validation](https://junglewise.ai/threats/cve-2026-30964-webauthn-framework-allowed-origins-collapses-url-like-origins-to)
- [The FIDO2/Webauthn Support for PHP library allows enumeration of valid usernames](https://junglewise.ai/threats/cve-2024-39912-the-fido2-webauthn-support-for-php-library-allows-enumeration-of)