CVE-2023-3590: Mattermost Server

High severity, CVSS 7.5. EPSS: 0.4% chance of exploitation in the next 30 days.

Mattermost fails to delete card attachments in Boards, allowing an attacker to access deleted attachments.

Affected products

• Mattermost Mattermost Server: from 7.10.0, before 7.10.3 (fixed in 7.10.3)

Published 2023-07-17. Last modified 2026-06-17.