CVE-2025-66554: nextcloud contacts

csirt@kutim:~/threat-intel/cve/CVE-2025-66554

CVSS 5.4 · Medium EPSS 0,25%

Kerentanan Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') pada nextcloud contacts. Skor CVSS 3.1 5.4 (Medium) menurut NVD.

Deskripsi (NVD)

Contacts app for Nextcloud easily syncs contacts from various devices with your Nextcloud and allows editing. Prior to 5.5.4, 6.0.6, and 7.2.5, a malicious user was able to modify their organisation and title field to load additional CSS files. Javascript and other options were correctly blocked by the content security policy of the Nextcloud Server code. This vulnerability is fixed in 5.5.4, 6.0.6, and 7.2.5.

Rincian

Terbit di NVD: 5 Desember 2025
Terakhir diubah: 17 Juni 2026
Status NVD: Analyzed
CVSS 3.1: 5.4 (Medium), sumber NVD
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N · uraikan di kalkulator
Jenis kelemahan (CWE): CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
EPSS (30 hari): 0,25% peluang dieksploitasi; lebih tinggi dari 15,1% CVE lain

Produk dan versi terdampak

Vendor	Produk	Versi terdampak
nextcloud	contacts	Versi 5.0.0 hingga sebelum 5.5.4
nextcloud	contacts	Versi 6.0.0 hingga sebelum 6.0.6
nextcloud	contacts	Versi 7.0.0 hingga sebelum 7.2.5

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

https://github.com/nextcloud/security-advisories/security/advisories/GHSA-9v78-cpfc-v6h2 patch · advisory vendor
https://hackerone.com/reports/3293290 permissions required · advisory vendor
https://github.com/nextcloud/contacts/commit/d954d098978dde1f121600e8b994e02f293c68b1 patch
https://github.com/nextcloud/contacts/pull/4619 issue tracking · patch

Sumber: NVD · CVE.org · EPSS. Halaman ini disusun otomatis dari data tersebut; pembaruan terakhir 5 Okt 2026, 20:11 WITA. Kalau sistem di Perangkat Daerah memakai produk ini dan butuh bantuan, laporkan lewat kanal pelaporan.