Mattermost versions 10.8.x <= 10.8.3, 10.5.x <= 10.5.8, 9.11.x <= 9.11.17, 10.10.x <= 10.10.0, 10.9.x <= 10.9.3 fail to validate import data which allows a system admin to crash the server via the bulk import feature.
{
"github_reviewed": true,
"github_reviewed_at": "2025-08-22T17:34:35Z",
"nvd_published_at": "2025-08-21T17:15:33Z",
"severity": "MODERATE",
"cwe_ids": [
"CWE-476"
]
}