Missing Authorization

Overview Affected versions of this package are vulnerable to Missing Authorization due to insufficient restriction of the groupconstrained channel flag in the channel patch API. An attacker can remove all participants from a group or direct message conversation by enabling the groupconstrained fl...

Missing Authorization

Overview Affected versions of this package are vulnerable to Missing Authorization due to insufficient restriction of the groupconstrained channel flag in the channel patch API. An attacker can remove all participants from a group or direct message conversation by enabling the groupconstrained fl...

EUVD-2026-43311

Mattermost versions 11.7.x = 11.7.2, 11.6.x = 11.6.4, 10.11.x = 10.11.19 fail to restrict the groupconstrained channel flag to public and private channels that support group synchronization, which allows an ordinary group or direct message member to remove all participants from the conversation v...

Unspecified Vulnerability in Mattermost Server (CNVD-2020-41169)

Mattermost Server is the United States Mattermost company's set of open source messaging platform. A security vulnerability exists in Mattermost Server versions prior to 5.1. An attacker non-channel member can exploit the vulnerability to modify the channel using the Channel PATCH API...