PT-2020-8433 · Mattermost · Mattermost Server

CVE-2017-18887

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Published

2020-06-19

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Updated

2026-07-30

CVSS v3.1

5.3

Medium

VectorAV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Name of the Vulnerable Software and Affected Versions: Mattermost Server versions prior to 4.3.0 Mattermost Server version 4.2.1 Mattermost Server version 4.1.2
Description: An issue was discovered in Mattermost Server that discloses the team creator's e-mail address to members.
Recommendations: For versions prior to 4.3.0, update to version 4.3.0 or later. For version 4.2.1, update to version 4.3.0 or later. For version 4.1.2, update to version 4.3.0 or later.

Fix

Information Disclosure

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Weakness Enumeration

Related Identifiers

CVE-2017-18887
GHSA-35C4-5QFP-WXJ6
GO-2025-4199
OPENSUSE-SU-2026:21483-1
SUSE-SU-2026:0037-1

Affected Products

Mattermost Server