Mattermost versions 10.1.x <= 10.1.3, 10.4.x <= 10.4.1, 9.11.x <= 9.11.7, 10.3.x <= 10.3.2, 10.2.x <= 10.2.2 fail to restrict channel export of archived channels when the "Allow users to view archived channels" is disabled which allows a user to export channel contents when they shouldn't have access to it
CVE ID: CVE-2025-24526
CVSS Base Severity: MEDIUM
CVSS Base Score: 4.3
CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Vendor: Mattermost
Product: Mattermost
EPSS Score: 0.03% (probability of being exploited)
EPSS Percentile: 4.09% (scored less or equal to compared to others)
EPSS Date: 2025-03-25 (when was this score calculated)