PT-2020-8899 · Mattermost · Mattermost Server

Published 2020-06-19 · Updated 2020-06-30 · CVE-2018-21256

Positive Technologies (AI Summary)

CVSS v3.1

4.3

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Mattermost Server versions prior to 5.1

Description An issue in Mattermost Server allows attackers to bypass intended access restrictions for group-message channel creation via the Group message slash command.

Recommendations For versions prior to 5.1, update to version 5.1 or later to resolve the issue.

Fix

Incorrect Permission

Weakness Enumeration

CWE-732

Related Identifiers

CVE-2018-21256

Affected Products

Mattermost Server

References · 3

• https://mattermost.com/security-updates · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2018-21256 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2018-21256 · Security Note