CVE-2023-39953: nextcloud user oidc

csirt@kutim:~/threat-intel/cve/CVE-2023-39953

CVSS 4.8 · Medium EPSS 0,54%

Kerentanan Incorrect Implementation of Authentication Algorithm pada nextcloud user oidc. Skor CVSS 3.1 4.8 (Medium) menurut NVD.

Deskripsi (NVD)

user_oidc provides the OIDC connect user backend for Nextcloud, an open-source cloud platform. Starting in version 1.0.0 and prior to version 1.3.3, missing verification of the issuer would have allowed an attacker to perform a man-in-the-middle attack returning corrupted or known token they also have access to. user_oidc 1.3.3 contains a patch. No known workarounds are available.

Rincian

Terbit di NVD: 10 Agustus 2023
Terakhir diubah: 17 Juni 2026
Status NVD: Modified
CVSS 3.1: 4.8 (Medium), sumber NVD
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N · uraikan di kalkulator
Jenis kelemahan (CWE): CWE-303: Incorrect Implementation of Authentication Algorithm
EPSS (30 hari): 0,54% peluang dieksploitasi; lebih tinggi dari 44,0% CVE lain

Produk dan versi terdampak

Vendor	Produk	Versi terdampak
nextcloud	user oidc	Versi 1.0.0 hingga sebelum 1.3.3

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

https://github.com/nextcloud/security-advisories/security/advisories/GHSA-xx3h-v363-q36j patch · advisory vendor
https://github.com/nextcloud/user_oidc/pull/642 patch
https://hackerone.com/reports/2021684 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.