An issue was discovered in Mattermost Server before 4.2.0, 4.1.1, and 4.0.5. It allows crafted posts that potentially cause a web browser to hang.
{
"cwe_ids": [
"CWE-404"
],
"github_reviewed": true,
"github_reviewed_at": "2026-01-12T19:29:16Z",
"nvd_published_at": "2020-06-19T19:15:00Z",
"severity": "MODERATE"
}