CVE-2023-27591: Unauthenticated Miniflux user can bypass allowed networks check to obtain Prometheus metrics

April 2, 2025

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).

References

github.com/advisories/GHSA-3qjf-qh38-x73v
github.com/miniflux/v2
github.com/miniflux/v2/pull/1745
github.com/miniflux/v2/releases/tag/2.0.43
github.com/miniflux/v2/security/advisories/GHSA-3qjf-qh38-x73v
miniflux.app/docs/configuration.html
nvd.nist.gov/vuln/detail/CVE-2023-27591

Code Behaviors & Features

Detect and mitigate CVE-2023-27591 with GitLab Dependency Scanning

Secure your software supply chain by verifying that all open source dependencies used in your projects contain no disclosed vulnerabilities. Dependency Scanning using SBOM also detects vulnerabilities from proprietary advisories that this site does not include. Learn more about Dependency Scanning using SBOM →