CVE-2025-0476: Mobile crash via file with specially crafted filename

Severity: medium (CVSS 4.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-01-16 · updated 2026-06-17
Weakness: CWE-1287

Description

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 Mobile: before 2.23.0 — fixed in 2.23.0

How to fix

Upgrade to a fixed version: Mattermost Mobile 2.23.0. Check the vendor advisory for mitigations.

References

https://mattermost.com/security-updates

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