CVE-2021-32654: nextcloud server

csirt@kutim:~/threat-intel/cve/CVE-2021-32654

CVSS 9.1 · Critical EPSS 1,8%

Kerentanan Authorization Bypass Through User-Controlled Key pada nextcloud server. Skor CVSS 3.1 9.1 (Critical) menurut NVD.

Deskripsi (NVD)

Nextcloud Server is a Nextcloud package that handles data storage. In versions prior to 19.0.11, 20.0.10, and 21.0.2, an attacker is able to receive write/read privileges on any Federated File Share. Since public links can be added as federated file share, this can also be exploited on any public link. Users can upgrade to patched versions (19.0.11, 20.0.10 or 21.0.2) or, as a workaround, disable federated file sharing.

Rincian

Terbit di NVD: 1 Juni 2021
Terakhir diubah: 17 Juni 2026
Status NVD: Modified
CVSS 3.1: 9.1 (Critical), sumber NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N · uraikan di kalkulator
Jenis kelemahan (CWE): CWE-639: Authorization Bypass Through User-Controlled Key
EPSS (30 hari): 1,8% peluang dieksploitasi; lebih tinggi dari 78,5% CVE lain

Produk dan versi terdampak

Vendor	Produk	Versi terdampak
nextcloud	nextcloud server	Semua versi sebelum 19.0.11
nextcloud	nextcloud server	Versi 20.0.0 hingga sebelum 20.0.10
nextcloud	nextcloud server	Versi 21.0.0 hingga sebelum 21.0.2

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

https://github.com/nextcloud/security-advisories/security/advisories/GHSA-jf9h-v24c-22g5 advisory pihak ketiga
https://hackerone.com/reports/1170024 permissions required · advisory pihak ketiga
https://security.gentoo.org/glsa/202208-17 advisory pihak ketiga

Sumber: NVD · CVE.org · EPSS. Halaman ini disusun otomatis dari data tersebut; pembaruan terakhir 5 Okt 2026, 20:10 WITA. Kalau sistem di Perangkat Daerah memakai produk ini dan butuh bantuan, laporkan lewat kanal pelaporan.