CVE-2025-66558 (GCVE-0-2025-66558)
Vulnerability from cvelistv5
Published
2025-12-05 18:00
Modified
2025-12-05 18:35
Severity ?
3.1 (Low) - CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Summary
Nextcloud Twofactor WebAuthn is the WebAuthn Two-Factor Provider for Nextcloud. Prior to 1.4.2 and 2.4.1, a missing ownership check allowed an attack to take-away a 2FA webauthn device when correctly guessing a 80-128 character long random string of letters, numbers and symbols. The victim would then be prompted to register a new device on the next login. The attacker can not authenticate as the victim. This vulnerability is fixed in 1.4.2 and 2.4.1.
References
Impacted products
Vendor Product Version
nextcloud security-advisories Version: < 1.4.2
Version: >= 2.0.0-beta.1, < 2.4.1
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