An unauthenticated user can retrieve Prometheus metrics from a publicly reachable Miniflux instance where the METRICS_COLLECTOR configuration option is enabled and METRICS_ALLOWED_NETWORKS is set to 127.0.0.1/8 (the default).
PR #1745 fixes the problem. Available in Miniflux >= 2.0.43.
Set METRICS_COLLECTOR to false (default) or run Miniflux behind a trusted reverse-proxy.
{
"nvd_published_at": "2023-03-17T20:15:00Z",
"cwe_ids": [
"CWE-1220",
"CWE-200"
],
"github_reviewed_at": "2025-04-02T17:24:11Z",
"severity": "HIGH",
"github_reviewed": true
}