{"id":"CVE-2023-27591","aliases":["GHSA-3qjf-qh38-x73v"],"url":"https://o3.security/vulnerability/CVE-2023-27591","summary":"Unauthenticated Miniflux user can bypass allowed networks check to obtain Prometheus metrics","details":"### Impact\n\nAn unauthenticated user can retrieve Prometheus metrics from a publicly reachable Miniflux instance where the `METRICS_COLLECTOR` [configuration option](https://miniflux.app/docs/configuration.html#metrics-collector) is enabled and `METRICS_ALLOWED_NETWORKS` is set to `127.0.0.1/8` (the default).\n\n### Patches\n\nPR #1745 fixes the problem. Available in Miniflux >= 2.0.43.\n\n### Workarounds\n\nSet `METRICS_COLLECTOR` to `false` (default) or run Miniflux behind a trusted reverse-proxy.\n\n### References\n\n- https://miniflux.app/docs/configuration.html#metrics-collector\n- https://miniflux.app/docs/configuration.html#metrics-allowed-networks","published":"2023-03-17T19:04:03.702Z","modified":"2026-10-28T02:30:28.010203221Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"},"epss":{"score":0.00755,"percentile":0.52501,"asOf":"2026-08-27"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"miniflux.app/v2","fixedVersion":"2.0.43"},{"ecosystem":"Go","name":"miniflux.app","fixedVersion":null}],"fix":{"url":"https://github.com/miniflux/v2/pull/1745","label":"miniflux/v2#1745"},"references":[{"type":"WEB","url":"https://github.com/miniflux/v2/releases/tag/2.0.43"},{"type":"WEB","url":"https://miniflux.app/docs/configuration.html#metrics-collector"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/27xxx/CVE-2023-27591.json"},{"type":"ADVISORY","url":"https://github.com/miniflux/v2/security/advisories/GHSA-3qjf-qh38-x73v"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-27591"},{"type":"FIX","url":"https://github.com/miniflux/v2/pull/1745"},{"type":"PACKAGE","url":"https://github.com/miniflux/v2"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-10-28T02:30:28.010203221Z"}}