CVE-2025-14350

published 2026-02-16

CVE-2025-14350: 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…

Priority P4 22 medium 4.3 CVSS 3.1

AV N AC L PR L UI N S U C L I N A N

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

Affected

14 ranges

Vendor	Product	Version range	Fixed in
github.com	mattermost_mattermost-server	>= 0 < 5.3.2-0.20251209134645-761e56bb11cc	5.3.2-0.20251209134645-761e56bb11cc
github.com	mattermost_mattermost-server	>= 10.11.0	—
github.com	mattermost_mattermost-server	>= 10.11.0+incompatible	—
github.com	mattermost_mattermost-server	>= 11.1.0	—
github.com	mattermost_mattermost-server	>= 11.1.0+incompatible	—
github.com	mattermost_mattermost-server	>= 11.2.0	—
github.com	mattermost_mattermost-server	>= 11.2.0+incompatible	—
github.com	mattermost_mattermost_server_v8	>= 0 < 8.0.0-20251209134645-761e56bb11cc	8.0.0-20251209134645-761e56bb11cc
mattermost	mattermost	10.11.0 – 10.11.9	—
mattermost	mattermost	11.1.0 – 11.1.2	—
mattermost	mattermost	11.2.0 – 11.2.1	—
mattermost	mattermost_server	>= 10.11.0 < 10.11.10	10.11.10
mattermost	mattermost_server	>= 11.1.0 < 11.1.3	11.1.3
mattermost	mattermost_server	>= 11.2.0 < 11.2.2	11.2.2

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CWE-862