CVE-2025-0476: Mattermost Mobile

Medium severity, CVSS 4.3. EPSS: 0.4% chance of exploitation in the next 30 days.

Mattermost Mobile Apps versions <=2.22.0 fail to properly handle specially crafted attachment names, which allows an attacker to crash the mobile app for any user who opened a channel containing the specially crafted attachment

Affected products

• Mattermost Mattermost Mobile: before 2.23.0 (fixed in 2.23.0)

Published 2025-01-16. Last modified 2026-06-17.