CVE-2025-10545

CVE-2025-10545CVE-2025-10545

mattermost / mattermost_server

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

Scoring

CVSS 3.1 ()
VectorCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
Last modified2026-10-19
Sourced from NVD. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.