PT-2020-8418 · Mattermost · Mattermost Server

Published 2020-06-19 · Updated 2025-11-07 · CVE-2017-18872

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 4.4.3 Mattermost Server versions prior to 4.3.3

Description: An issue was discovered where attackers could reconfigure an OAuth app in some cases where Mattermost is an OAuth 2.0 service provider.

Recommendations: For versions prior to 4.4.3, update to version 4.4.3 or later. For versions prior to 4.3.3, update to version 4.3.3 or later.

Fix

Missing Authorization

Incorrect Permission

Weakness Enumeration

CWE-862

CWE-732

Related Identifiers

CVE-2017-18872

GHSA-HGRP-FGM8-56G8

GO-2025-4075

OPENSUSE-SU-2025:15710-1

Affected Products

Mattermost Server

References · 82

• https://nvd.nist.gov/vuln/detail/CVE-2017-18872 · Security Note
• https://osv.dev/vulnerability/CVE-2017-18872 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2025:15710-1 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-hgrp-fgm8-56g8 · Vendor Advisory
• https://osv.dev/vulnerability/GO-2025-4075 · Vendor Advisory
• https://mattermost.com/security-updates · Vendor Advisory
• https://github.com/mattermost/mattermost · Note
• https://github.com/mattermost/mattermost/commit/8f6bb1570dd234c63de5241eff9fbb268aad358c · Note
• https://suse.com/security/cve/CVE-2025-58356 · Note
• https://suse.com/security/cve/CVE-2025-61141 · Note
• https://suse.com/security/cve/CVE-2025-64102 · Note
• https://suse.com/security/cve/CVE-2025-62375 · Note
• https://suse.com/security/cve/CVE-2016-11074 · Note
• https://suse.com/security/cve/CVE-2025-58075 · Note
• https://suse.com/security/cve/CVE-2016-11072 · Note