CVE-2023-3585: Mattermost Server

Medium severity, CVSS 4.3. EPSS: 0.5% chance of exploitation in the next 30 days.

Mattermost Boards fail to properly validate a board link, allowing an attacker to crash a channel by posting a specially crafted boards link.

Affected products

• Mattermost Mattermost Server: before 7.8.7 (fixed in 7.8.7); from 7.9.0, before 7.9.5 (fixed in 7.9.5); from 7.10.0, before 7.10.3 (fixed in 7.10.3)

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