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" ], "severity": "MODERATE", "github_reviewed": true, "github_reviewed_at": "2025-05-17T14:02:10Z" }