Authorization bypass through user-controlled key in Twofactor WebAuthn - CVE-2025-66558
Published: December 5, 2025
Vulnerability identifier: #VU119220
CSH Severity: Low
CVSS v4: 2.3 [CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2025-66558
CWE-ID: CWE-639
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to compromise the target system.
The vulnerability exists due to a missing ownership check. A remote user can take-away a 2FA webauthn device.
Affected software
Twofactor WebAuthn
How to mitigate CVE-2025-66558
Install updates from vendor's website.
Twofactor WebAuthn - addressed in versions 1.4.2, 2.4.1