PT-2020-8895 · Mattermost · Mattermost Server

Published 2020-06-19 · Updated 2020-06-30 · CVE-2018-21252

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 5.2 Mattermost Server version 5.1.1 Mattermost Server version 5.0.3 Mattermost Server version 4.10.3

Description An issue was discovered that allows attackers to bypass a domain-based policy for signups by using multiple e-mail addresses.

Recommendations For Mattermost Server versions prior to 5.2, update to version 5.2 or later. For Mattermost Server version 5.1.1, update to version 5.2 or later. For Mattermost Server version 5.0.3, update to version 5.2 or later. For Mattermost Server version 4.10.3, update to version 5.2 or later.

Fix

Incorrect Permission

Weakness Enumeration

CWE-732

Related Identifiers

CVE-2018-21252

Affected Products

Mattermost Server

References · 3

• https://mattermost.com/security-updates · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2018-21252 · Security Note
• https://osv.dev/vulnerability/CVE-2018-21252 · Vendor Advisory