Mattermost versions 10.11.x <= 10.11.12, 11.5.x <= 11.5.0, 11.4.x <= 11.4.2, 11.3.x <= 11.3.2 fail to validate CSRF tokens on an authentication endpoint which allows an attacker to update a user's authentication method via a CSRF attack by tricking a user into visiting a malicious page. Mattermost Advisory ID: MMSA-2026-00625.
{
"cwe_ids": [
"CWE-352"
],
"github_reviewed": true,
"github_reviewed_at": "2026-04-29T20:35:51Z",
"nvd_published_at": "2026-04-15T11:16:33Z",
"severity": "MODERATE"
}