CVE-2023-3614: Mattermost Server

Low severity, CVSS 3.3. EPSS: 0.4% chance of exploitation in the next 30 days.

Mattermost fails to properly validate a gif image file, allowing an attacker to consume a significant amount of server resources, making the server unresponsive for an extended period of time by linking to specially crafted image file.

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.