CVE-2025-66514: nextcloud mail

csirt@kutim:~/threat-intel/cve/CVE-2025-66514

CVSS 5.4 · Medium EPSS 0,25%

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

Deskripsi (NVD)

Nextcloud Mail is the mail app for Nextcloud, a self-hosted productivity platform. Prior to 5.5.3, a stored HTML injection in the Mail app's message list allowed an authenticated user to inject HTML into the email subjects. Javascript was correctly blocked by the content security policy of the Nextcloud Server code.

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	mail	Semua versi sebelum 5.5.3

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

https://github.com/nextcloud/security-advisories/security/advisories/GHSA-v394-8gpc-6fv5 patch · advisory vendor
https://hackerone.com/reports/3357036 permissions required · advisory vendor
https://github.com/nextcloud/mail/commit/c64fcc3b79e0c089b5e1d2e04a07bfa740b2ac09 patch
https://github.com/nextcloud/mail/pull/11740 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.