PT-2020-8462 · Mattermost · Mattermost Server

Published 2020-06-19 · Updated 2026-03-03 · CVE-2017-18916

Positive Technologies (AI Summary)

CVSS v4.0

6.9

Medium

Base vector

AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

Name of the Vulnerable Software and Affected Versions: Mattermost Server versions prior to 3.8.2 Mattermost Server versions prior to 3.7.5 Mattermost Server versions prior to 3.6.7

Description: The issue concerns API endpoint access control not honoring an integration permission restriction.

Recommendations: For versions prior to 3.8.2, update to version 3.8.2 or later. For versions prior to 3.7.5, update to version 3.7.5 or later. For versions prior to 3.6.7, update to version 3.6.7 or later.

Fix

Improper Access Control

Incorrect Permission

Weakness Enumeration

CWE-284

CWE-732

Related Identifiers

CVE-2017-18916

GHSA-X33G-375J-JHF7

GO-2026-4467

SUSE-SU-2026:0757-1

Affected Products

Mattermost Server

References · 118

• https://nvd.nist.gov/vuln/detail/CVE-2017-18916 · Security Note
• https://osv.dev/vulnerability/GO-2026-4467 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-x33g-375j-jhf7 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:0757-1 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2017-18916 · Vendor Advisory
• https://mattermost.com/security-updates · Vendor Advisory
• https://github.com/mattermost/mattermost · Note
• https://github.com/mattermost/mattermost/commit/b74e85653660525d351d090a1e1874ae933bcbc8 · Note
• https://github.com/mattermost/mattermost/commit/fb325cc339eb8d8efb60dbadc48fd38897201c6f · Note
• https://github.com/mattermost/mattermost/commit/0968e4079e0aa670254f3fe3a7248d126e3cf877 · Note
• https://suse.com/security/cve/CVE-2025-64111 · Note
• https://suse.com/security/cve/CVE-2026-0998 · Note
• https://suse.com/security/cve/CVE-2026-22892 · Note
• https://suse.com/security/cve/CVE-2026-24122 · Note
• https://suse.com/security/cve/CVE-2026-21434 · Note