Matrix Synapse before 0.34.0.1, when the macaroon_secret_key authentication parameter is not set, uses a predictable value to derive a secret key and other secrets which could allow remote attackers to impersonate users.
{
"cwe_ids": [
"CWE-330"
],
"github_reviewed": true,
"github_reviewed_at": "2023-07-19T20:18:22Z",
"severity": "HIGH",
"nvd_published_at": "2019-03-21T16:01:00Z"
}