CVE-2023-48268: Mattermost

High severity, CVSS 7.5. EPSS: 0.7% chance of exploitation in the next 30 days.

Mattermost fails to limit the amount of data extracted from compressed archives during board import in Mattermost Boards allowing an attacker to consume excessive resources, possibly leading to Denial of Service, by importing a board using a specially crafted zip (zip bomb).

Affected products

• Mattermost Mattermost: up to and including 7.8.12; from 8.0.0, up to and including 8.1.3; from 9.0.0, up to and including 9.0.1; version 9.1.0 only

Published 2023-11-27. Last modified 2026-06-17.