CVE-2025-12419: mattermost server

csirt@kutim:~/threat-intel/cve/CVE-2025-12419

CVSS 9.9 · Critical EPSS 0,35%

Kerentanan Incorrect Implementation of Authentication Algorithm pada mattermost server. Skor CVSS 3.1 9.9 (Critical) menurut mattermost.com.

Deskripsi (NVD)

Mattermost versions 10.12.x <= 10.12.1, 10.11.x <= 10.11.4, 10.5.x <= 10.5.12, 11.0.x <= 11.0.3 fail to properly validate OAuth state tokens during OpenID Connect authentication which allows an authenticated attacker with team creation privileges to take over a user account via manipulation of authentication data during the OAuth completion flow. This requires email verification to be disabled (default: disabled), OAuth/OpenID Connect to be enabled, and the attacker to control two users in the SSO system with one of them never having logged into Mattermost.

Rincian

Terbit di NVD: 27 November 2025
Terakhir diubah: 17 Juni 2026
Status NVD: Analyzed
CVSS 3.1: 9.9 (Critical), sumber mattermost.com
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H · uraikan di kalkulator
Jenis kelemahan (CWE): CWE-303: Incorrect Implementation of Authentication Algorithm
EPSS (30 hari): 0,35% peluang dieksploitasi; lebih tinggi dari 26,1% CVE lain

Produk dan versi terdampak

Vendor	Produk	Versi terdampak
mattermost	mattermost server	Versi 10.5.0 hingga sebelum 10.5.13
mattermost	mattermost server	Versi 10.11.0 hingga sebelum 10.11.5
mattermost	mattermost server	Versi 10.12.0 hingga sebelum 10.12.2
mattermost	mattermost server	Versi 11.0.0 hingga sebelum 11.0.4

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

https://mattermost.com/security-updates advisory vendor

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.