Mattermost versions 9.11.x <= 9.11.8 fail to prompt for explicit approval before adding a team admin to a private channel, which team admins to joining private channels via crafted permalink links without explicit consent from them.
{
"cwe_ids": [
"CWE-863"
],
"nvd_published_at": "2025-03-21T09:15:13Z",
"github_reviewed": true,
"severity": "LOW",
"github_reviewed_at": "2025-03-21T22:38:08Z"
}