🛡️ CVE-2025-14350
🟡 CVSS 4.3 — Medium ✅ No Known Exploit CWE-862 NVD
4.3
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Mattermost versions 11.1.x <= 11.1.2, 10.11.x <= 10.11.9, 11.2.x <= 11.2.1 fail to properly validate team membership when processing channel mentions which allows authenticated users to determine the existence of teams and their URL names via posting channel shortlinks and observing the channel_mentions property in the API response. Mattermost Advisory ID: MMSA-2025-00563

Details

Severity Medium
CVSS Score 4.3
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
CWE CWE-862
Public Exploit ✅ No
Source NVD
Published 2026-02-16
Updated 2026-06-15
Modified 2026-04-01
Fix URL N/A

Affected Packages

Software From version Fixed in
github.com/mattermost/mattermost-server
github.com/mattermost/mattermost-server/v5
github.com/mattermost/mattermost-server/v6
github.com/mattermost/mattermost/server/v8
mattermost-server 11.2.0 11.2.2

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