Security Advisory

CVE-2025-10545

CVE vulnerability detail — eXtreme Datacenter Security Operations

Published 2025-10-16 08:24:25

Last updated 2025-10-16 14:14:09

Assigner Mattermost

State PUBLISHED

Description

Mattermost versions 10.5.x <= 10.5.10, 10.11.x <= 10.11.2 fail to properly validate guest user permissions when adding channel members which allows guest users to add any team members to their private channels via the `/api/v4/channels/{channel_id}/members` endpoint

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