CVE-2025-66558

Katalog CVE

CVSS 4.3 · Medium EPSS 0,28%

Kerentanan Authorization Bypass Through User-Controlled Key pada nextcloud two-factor webauthn. Skor CVSS 3.1 4.3 (Medium) menurut NVD.

Deskripsi (NVD)

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.

Rincian

Terbit di NVD

5 Desember 2025

Terakhir diubah

17 Juni 2026

Status NVD

Analyzed

CVSS 3.1

4.3 (Medium), sumber NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-639: Authorization Bypass Through User-Controlled Key

EPSS (30 hari)

0,28% peluang dieksploitasi; lebih tinggi dari 18,8% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-fr8x-mvjg-wf9q patch · advisory vendor
• https://hackerone.com/reports/3360354 permissions required · advisory vendor
• https://github.com/nextcloud/twofactor_webauthn/commit/5d2302166d31ee2e01b2e21556bd5372156da13d patch
• https://github.com/nextcloud/twofactor_webauthn/pull/881 issue tracking · patch