CVE-2021-38299
CRITICAL
9.8
CVSS Score
Published: September 27, 2021 at 05:55 AM UTC
Updated: June 17, 2026 at 04:01 AM UTC
1 product affected across 1 vendorWebauthn Framwork
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Severity
CRITICAL9.8
Exploit prediction
EPSS 2%
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.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
v < 3.2.93.3.0 ≤ v < 3.3.4
Affected range stops below 3.2.9, so it looks safe — our inference, not a vendor statement
Affected range stops below 3.3.4, so it looks safe — our inference, not a vendor statement
Remediation
No guide yetNo remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.
References (2)
x_refsource_MISCRelease NotesThird Party Advisory
Source: [email protected]
https://github.com/web-auth/webauthn-framework/releasesx_refsource_MISCThird Party Advisory
Source: [email protected]
https://www.fzi.de/en/news/news/detail-en/artikel/fsa-2021-1-fehlende-ueberpruefung-von-user-presence-in-webauthn-framework/CVSS
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- HIGH
- Integrity
- HIGH
- Availability
- HIGH
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-287
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