CVE-2025-20072: Mattermost Mobile

High severity, CVSS 7.5. EPSS: 0.5% chance of exploitation in the next 30 days.

Mattermost Mobile versions <= 2.22.0 fail to properly validate the style of proto supplied to an action's style in post.props.attachments, which allows an attacker to crash the mobile via crafted malicious input.

Affected products

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

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