Latest medium severity vulnerabilities for "mattermost boards plugin"

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Mattermost Boards PluginMattermost Boards plugin didn’t enforce role-based authorization on board channel link allowing board editors to expose boards to arbitrary channels

Risk 27

Severity

6.5

EPSS

0.25%

AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Mattermost versions 11.7.x <= 11.7.6, 10.11.x <= 10.11.21, 11.8.x <= 11.8.3 fail to enforce PermissionManageBoardRoles on the channelId field of the batch endpoint, which allows an authenticated board editor to relink any board they can edit to an arbitrary channel via a crafted PATCH request. Mattermost Advisory ID: MMSA-2026-00686

First published (updated )

CVE-2026-9859

Mattermost Boards PluginInsecure Direct Object Reference in Mattermost Boards Plugin Enables Unauthorised Comment Deletion

Risk 22

Severity

4.3

AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Mattermost versions 11.0.x <= 11.0.2, 10.12.x <= 10.12.1, 10.11.x <= 10.11.4, 10.5.x <= 10.5.12 fail to validate user permissions when deleting comments in Boards, which allows an authenticated user with the editor role to delete comments created by other users.

Remedy

Update Mattermost to versions 11.1.0, 11.0.3, 10.12.2, 10.11.5, 10.5.13 or higher.

First published (updated )

CVE-2025-12756

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