CVE-2023-39959: nextcloud server

csirt@kutim:~/threat-intel/cve/CVE-2023-39959

CVSS 5.3 · Medium EPSS 0,61%

Kerentanan Improper Access Control pada nextcloud server. Skor CVSS 3.1 5.3 (Medium) menurut NVD.

Deskripsi (NVD)

Nextcloud Server provides data storage for Nextcloud, an open source cloud platform. Starting in version 25.0.0 and prior to versions 25.0.9, 26.0.4, and 27.0.1, unauthenticated users could send a DAV request which reveals whether a calendar or an address book with the given identifier exists for the victim. Nextcloud Server versions 25.0.9, 26.0.4, and 27.0.1 and Nextcloud Enterprise Server versions 25.0.9, 26.0.4, and 27.0.1 contain a patch for this issue. No known workarounds are available.

Rincian

Terbit di NVD: 10 Agustus 2023
Terakhir diubah: 17 Juni 2026
Status NVD: Modified
CVSS 3.1: 5.3 (Medium), sumber NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N · uraikan di kalkulator
Jenis kelemahan (CWE): CWE-284: Improper Access Control
EPSS (30 hari): 0,61% peluang dieksploitasi; lebih tinggi dari 47,6% CVE lain

Produk dan versi terdampak

Vendor	Produk	Versi terdampak
nextcloud	nextcloud server	Versi 25.0.0 hingga sebelum 25.0.9
nextcloud	nextcloud server	Versi 26.0.0 hingga sebelum 26.0.4
nextcloud	nextcloud server	Versi 27.0.0

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

https://github.com/nextcloud/security-advisories/security/advisories/GHSA-g97r-8ffm-hfpj advisory vendor
https://github.com/nextcloud/server/pull/38747 patch
https://hackerone.com/reports/1832126 permissions required

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.