Mattermost versions 10.5.x <= 10.5.2, 9.11.x <= 9.11.11 failed to properly verify a user's permissions when accessing groups, which allows an attacker to view group information via an API request.
{
"nvd_published_at": "2025-05-15T16:15:33Z",
"cwe_ids": [
"CWE-863"
],
"github_reviewed_at": "2025-05-17T14:02:10Z",
"severity": "MODERATE",
"github_reviewed": true
}