CVE-2021-32656

Katalog CVE

CVSS 8.6 · High EPSS 1,8%

Kerentanan Improper Access Control pada nextcloud server. Skor CVSS 3.1 8.6 (High) menurut NVD.

Deskripsi (NVD)

Nextcloud Server is a Nextcloud package that handles data storage. A vulnerability in federated share exists in versions prior to 19.0.11, 20.0.10, and 21.0.2. An attacker can gain access to basic information about users of a server by accessing a public link that a legitimate server user added as a federated share. This happens because Nextcloud supports sharing registered users with other Nextcloud servers, which can be done automatically when selecting the "Add server automatically once a federated share was created successfully" setting. The vulnerability is patched in versions 19.0.11, 20.0.10, and 21.0.2 As a workaround, disable "Add server automatically once a federated share was created successfully" in the Nextcloud settings.

Rincian

Terbit di NVD

1 Juni 2021

Terakhir diubah

17 Juni 2026

Status NVD

Modified

CVSS 3.1

8.6 (High), sumber NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-284: Improper Access Control

EPSS (30 hari)

1,8% peluang dieksploitasi; lebih tinggi dari 78,4% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-j875-vr2q-h6x6 advisory pihak ketiga
• https://hackerone.com/reports/1167853 permissions required · advisory pihak ketiga
• https://security.gentoo.org/glsa/202208-17 advisory pihak ketiga