Main Vulnerability Database Vulnerabilities #VU119220

#VU119220 Authorization bypass through user-controlled key in Twofactor WebAuthn - CVE-2025-66558

Published: December 5, 2025

Vulnerability identifier: #VU119220

Vulnerability risk: Low

CVSSv4.0: 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/E:U/U:Clear

CVE-ID: CVE-2025-66558

CWE-ID: CWE-639

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vulnerable software:
Twofactor WebAuthn

Software vendor:
Nextcloud

Description

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.

Install updates from vendor's website.