CVE-2025-14350

MEDIUM

Mattermost <11.1.2, 10.11.9, 11.2.1 - Info Disclosure

Title source: llm
STIX 2.1

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

References (1)

Core 1
Core References
Various Sources vendor-advisory
https://mattermost.com/security-updates

Scores

CVSS v3 4.3
EPSS 0.0004
EPSS Percentile 12.1%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-862
Status published
Products (3)
mattermost/mattermost 0 - 8.0.0-20251209134645-761e56bb11ccGo
mattermost/mattermost-server 11.1.0Go
mattermost/mattermost_server 10.11.0 - 10.11.10
Published Feb 16, 2026
Tracked Since Feb 18, 2026