CVE-2015-9548: Mattermost Server

High severity, CVSS 7.5. EPSS: 1.1% chance of exploitation in the next 30 days.

An issue was discovered in Mattermost Server before 1.2.0. It allows attackers to cause a denial of service (memory consumption) via a small compressed file that has a large size when uncompressed.

Affected products

• Mattermost Mattermost Server: before 1.2.0 (fixed in 1.2.0)

Published 2020-06-19. Last modified 2026-06-17.