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
Metrics
Affected Vendors & Products
References
| Link | Providers |
|---|---|
| https://mattermost.com/security-updates |
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History
Wed, 18 Feb 2026 20:30:00 +0000
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| First Time appeared |
Mattermost mattermost Server
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| CPEs | cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Mattermost mattermost Server
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Tue, 17 Feb 2026 17:15:00 +0000
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| Metrics |
ssvc
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Tue, 17 Feb 2026 09:00:00 +0000
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| First Time appeared |
Mattermost
Mattermost mattermost |
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| Vendors & Products |
Mattermost
Mattermost mattermost |
Mon, 16 Feb 2026 12:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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 | |
| Title | Information disclosure via channel mentions in posts | |
| Weaknesses | CWE-862 | |
| References |
| |
| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: Mattermost
Published: 2026-02-16T12:05:33.312Z
Updated: 2026-02-17T17:06:07.112Z
Reserved: 2025-12-09T15:43:31.735Z
Link: CVE-2025-14350
Updated: 2026-02-17T16:42:14.334Z
Status : Analyzed
Published: 2026-02-16T13:15:59.953
Modified: 2026-02-18T20:19:20.907
Link: CVE-2025-14350
No data.