Medium severity · published Feb 16, 2026
CVE-2025-14350
Information disclosure via channel mentions in posts
4.3
CVSS
0.2%
EPSS
No
On KEV
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
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
Low
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 9% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MA
Mattermost · Mattermost
11.1.0 through 11.1.2; 10.11.0 through 10.11.9; 11.2.0 through 11.2.1 · source: vendor
MS
Mattermost Server · Mattermost
10.11.0 before 10.11.10; 11.1.0 before 11.1.3; 11.2.0 before 11.2.2 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-14350
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-14350
Vendor Advisory
https://mattermost.com/security-updates
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