CVE-2018-21257

MEDIUM

Mattermost Server < 5.1.0 - Missing Authorization via Channel Header Slash Command API

Title source: llm
STIX 2.1

Description

An issue was discovered in Mattermost Server before 5.1. It allows attackers to bypass intended access restrictions (for setting a channel header) via the Channel header slash command API.

References (1)

Core 1
Core References
Vendor Advisory x_refsource_confirm
https://mattermost.com/security-updates/

Scores

CVSS v3 5.3
EPSS 0.0019
EPSS Percentile 41.1%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Details

CWE
CWE-862
Status published
Products (1)
mattermost/mattermost_server < 5.1.0
Published Jun 19, 2020
Tracked Since Feb 18, 2026