CVE-2017-18883

CRITICAL

Mattermost Server <4.3.0-4.1.2 - Info Disclosure

Title source: llm

Description

An issue was discovered in Mattermost Server before 4.3.0, 4.2.1, and 4.1.2, when serving as an OAuth 2.0 Service Provider. There is low entropy for authorization data.

References (1)

[Vendor Advisory] https://mattermost.com/security-updates/

Scores

CVSS v3 9.1

EPSS 0.0031

EPSS Percentile 54.0%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Classification

CWE

CWE-331

Status published

Affected Products (6)

mattermost/mattermost_server < 4.1.2

mattermost/mattermost_server

mattermost/mattermost-server < 4.1.2Go

Timeline

Published Jun 19, 2020

Tracked Since Feb 18, 2026