CVE-2021-38299

CRITICAL

Published Sep 27, 20214y ago · Modified Jun 17, 20262w ago

9.8 CVSS 3.1

Critical

Published Sep 27, 2021 4y ago

Last Modified Jun 17, 2026 2w ago

Description

Webauthn Framework 3.3.x before 3.3.4 has Incorrect Access Control. An attacker that controls a user's system is able to login to a vulnerable service using an attached FIDO2 authenticator without passing a check of the user presence.

CVSS Details

Base Score

9.8

Exploitability

3.9

Impact

5.9

Vector string

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector Network

Attack Complexity Low

Privileges Required None

User Interaction None

Scope Unchanged

Confidentiality High

Integrity High

Availability High

Threat Intelligence

No active exploitation signals — not in CISA KEV and no EPSS score yet.

Exploit & Patch Status

No Known Exploit

No Patch Available

Weaknesses 1

CWE-287 Improper Authentication Authentication

Affected Products 2

Vendor	Product	Version	Range
spomky-labs	webauthn_framwork	*	<3.2.9
spomky-labs	webauthn_framwork	*	≥3.3.0 – <3.3.4

References 2

github.com https://github.com/web-auth/webauthn-framework/releases

Release NotesThird Party Advisory
fzi.de https://www.fzi.de/en/news/news/detail-en/artikel/fsa-2021-1-fehlende-ueberpruefung-von-user-presence-in-webauthn-framework/

Third Party Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.