CVE-2021-39220: nextcloud mail

csirt@kutim:~/threat-intel/cve/CVE-2021-39220

CVSS 3.5 · Low EPSS 0,78%

Kerentanan Improper Input Validation pada nextcloud mail. Skor CVSS 3.1 3.5 (Low) menurut github.com.

Deskripsi (NVD)

Nextcloud is an open-source, self-hosted productivity platform The Nextcloud Mail application prior to versions 1.10.4 and 1.11.0 does by default not render images in emails to not leak the read state or user IP. The privacy filter failed to filter images with a relative protocol. It is recommended that the Nextcloud Mail application is upgraded to 1.10.4 or 1.11.0. There are no known workarounds aside from upgrading.

Rincian

Terbit di NVD: 25 Oktober 2021
Terakhir diubah: 17 Juni 2026
Status NVD: Modified
CVSS 3.1: 3.5 (Low), sumber github.com
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N · uraikan di kalkulator
Jenis kelemahan (CWE): CWE-20: Improper Input Validation
CWE-200: Exposure of Sensitive Information to an Unauthorized Actor
EPSS (30 hari): 0,78% peluang dieksploitasi; lebih tinggi dari 54,8% CVE lain

Produk dan versi terdampak

Vendor	Produk	Versi terdampak
nextcloud	mail	Semua versi sebelum 1.10.4

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

https://github.com/nextcloud/mail/pull/5470 patch · advisory pihak ketiga
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-6q9v-wm8r-rcv5 advisory pihak ketiga
https://hackerone.com/reports/1308147 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.