CVE-2026-2461

published 2026-03-16

CVE-2026-2461: Mattermost Plugins versions <=11.3 11.0.3 11.2.2 10.10.11.0 fail to implement authorisation checks on comment block modifications, which allows an authorised…

medium 4.3 CVSS 3.1

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

Mattermost Plugins versions <=11.3 11.0.3 11.2.2 10.10.11.0 fail to implement authorisation checks on comment block modifications, which allows an authorised attacker with editor permission to modify comments created by other board members. Mattermost Advisory ID: MMSA-2025-00559

Affected

6 ranges

Vendor	Product	Version range	Fixed in
github.com	mattermost_mattermost-plugin-boards	>= 0 < 0.0.0-20260108044135-57c5be5b6ef5	0.0.0-20260108044135-57c5be5b6ef5
mattermost	mattermost	<= 11.0.3	—
mattermost	mattermost_server	< 10.11.11	10.11.11
mattermost	mattermost_server	11.0.0 – 11.0.3	—
mattermost	mattermost_server	>= 11.1.0 < 11.2.3	11.2.3
mattermost	mattermost_server	>= 11.3.0 < 11.3.1	11.3.1

CWE-639