CVE-2026-0997: Incorrect Authorization

Mattermost versions 11.1.x = 11.1.2, 10.11.x = 10.11.9, 11.2.x = 11.2.1 and Mattermost Plugin Zoom versions =1.11.0 fail to validate the authenticated user when processing /plugins/zoom/api/v1/channel-preference, which allows any logged-in user to change Zoom meeting restrictions for arbitrary...

Improper Access Control

github.com/mattermost/mattermost-server is vulnerable to Improper Access Control. The vulnerability is caused due to a failure to disallow the modification of local channels by a remote, when shared channels are enabled. This allows a malicious remote user to make an arbitrary local channel...