CVE-2024-47145: Mattermost Server

Medium severity, CVSS 4.3. EPSS: 0.3% chance of exploitation in the next 30 days.

Mattermost versions 9.5.x <= 9.5.8 fail to properly authorize access to archived channels when viewing archived channels is disabled, which allows an attacker to view posts and files of archived channels via file links.

Affected products

• Mattermost Mattermost Server: from 9.5.0, before 9.5.9 (fixed in 9.5.9)

Published 2024-09-26. Last modified 2026-06-17.