CVE-2021-32802

Katalog CVE

CVSS 9.8 · Critical EPSS 2,6%

Kerentanan Inclusion of Functionality from Untrusted Control Sphere pada nextcloud server. Skor CVSS 3.1 9.8 (Critical) menurut NVD.

Deskripsi (NVD)

Nextcloud server is an open source, self hosted personal cloud. Nextcloud supports rendering image previews for user provided file content. For some image types, the Nextcloud server was invoking a third-party library that wasn't suited for untrusted user-supplied content. There are several security concerns with passing user-generated content to this library, such as Server-Side-Request-Forgery, file disclosure or potentially executing code on the system. The risk depends on your system configuration and the installed library version. It is recommended that the Nextcloud Server is upgraded to 20.0.12, 21.0.4 or 22.1.0. These versions do not use this library anymore. As a workaround users may disable previews by setting `enable_previews` to `false` in `config.php`.

Rincian

Terbit di NVD

7 September 2021

Terakhir diubah

17 Juni 2026

Status NVD

Modified

CVSS 3.1

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

Jenis kelemahan (CWE)

CWE-829: Inclusion of Functionality from Untrusted Control Sphere

EPSS (30 hari)

2,6% peluang dieksploitasi; lebih tinggi dari 84,9% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://docs.nextcloud.com/server/21/admin_manual/configuration_files/previews_configuration.html#disabling-pr... advisory vendor
• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-m682-v4g9-wrq7 mitigasi · advisory pihak ketiga
• https://hackerone.com/reports/1261413 permissions required · advisory pihak ketiga
• https://security.gentoo.org/glsa/202208-17 advisory pihak ketiga