#VU34212 Incorrect permission assignment for critical resource in Mattermost Server - CVE-2018-21256
Published: June 19, 2020 / Updated: August 8, 2020
Vulnerability identifier: #VU34212
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2018-21256
CWE-ID: CWE-732
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Mattermost Server
Mattermost Server
Software vendor:
Mattermost, Inc.
Mattermost, Inc.
Description
The vulnerability allows a remote authenticated user to manipulate data.
An issue was discovered in Mattermost Server before 5.1. It allows attackers to bypass intended access restrictions (for group-message channel creation) via the Group message slash command.
Remediation
Install update from vendor's website.