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mattermost/pluginsMissing authorization check allows unauthorized modification of other users' comments on a board

Risk 22
Severity
4.3
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

Remedy

Update Mattermost Plugins to versions 11.4.0, 11.3.1, 11.2.3, 10.11.11 or higher.
First published (updated )
CVE-2026-2461

mattermost/pluginsMS Teams plugin sensitive config values not properly masked in support packets

Risk 47
Severity
7.6
Infoleak
AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:L/A:N

Mattermost Plugins versions <=2.0.3.0 fail to properly mask sensitive configuration values which allows an attacker with access to support packets to obtain original plugin settings via exported configuration data. Mattermost Advisory ID: MMSA-2026-00606

Remedy

Update Mattermost Plugins to versions 2.3.1.0 or higher.
First published (updated )
CVE-2026-2476

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