CVE-2026-4286

LOW

Mattermost Playbooks Plugin - Unauthorized Team Transfer

Title source: manual
STIX 2.1

Description

Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13 fail to check if {{team_id}} was being changed when updating playbooks, allowing users with only {{Manage Playbook Configurations}} permission to change a playbook's team, bypassing manage members restriction via PUT api. Mattermost Advisory ID: MMSA-2025-00552

References (1)

Core 1
Core References
Vendor Advisory vendor-advisory
MMSA-2025-00552
https://mattermost.com/security-updates

Scores

CVSS v3 3.1
EPSS 0.0014
EPSS Percentile 4.0%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-863
Status published
Products (9)
Mattermost/Mattermost 10.11.0 - 10.11.13
mattermost/mattermost 10.11.0 - 10.11.14Go
Mattermost/Mattermost 10.11.14
Mattermost/Mattermost 11.5.0 - 11.5.1
mattermost/mattermost 11.5.0 - 11.5.2Go
Mattermost/Mattermost 11.5.2
Mattermost/Mattermost 11.6.0
mattermost/mattermost-plugin-playbooks 0 - 1.41.1-0.20260213020129-e1d6ec2c94e6Go
mattermost/mattermost_server 10.11.0 - 10.11.14
Published May 18, 2026
Tracked Since May 18, 2026