Mattermost versions 9.9.x <= 9.9.0, 9.5.x <= 9.5.6, 9.7.x <= 9.7.5, 9.8.x <= 9.8.1 fail to disallow the modification of local users when syncing users in shared channels. which allows a malicious remote to overwrite an existing local user.
{ "nvd_published_at": "2024-08-01T15:15:11Z", "cwe_ids": [ "CWE-284" ], "severity": "MODERATE", "github_reviewed": true, "github_reviewed_at": "2024-08-02T13:30:43Z" }