CVE-2023-27591: Unauthenticated Miniflux user can bypass allowed networks check to obtain Prometheus metrics
First published: Fri Mar 17 2023(Updated: )
### Impact An 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). ### Patches PR #1745 fixes the problem. Available in Miniflux >= 2.0.43. ### Workarounds Set `METRICS_COLLECTOR` to `false` (default) or run Miniflux behind a trusted reverse-proxy. ### References - https://miniflux.app/docs/configuration.html#metrics-collector - https://miniflux.app/docs/configuration.html#metrics-allowed-networks
Credit: security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Miniflux | <2.0.43 | |
| go/miniflux.app | <=1.0.46 | |
| go/miniflux.app/v2 | <=2.0.42 | 2.0.43 |
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Reference Links
- https://github.com/miniflux/v2/pull/1745
- https://github.com/miniflux/v2/releases/tag/2.0.43
- https://github.com/miniflux/v2/security/advisories/GHSA-3qjf-qh38-x73v
- https://miniflux.app/docs/configuration.html#metrics-collector
- https://nvd.nist.gov/vuln/detail/CVE-2023-27591
- https://github.com/advisories/GHSA-3qjf-qh38-x73v (Advisory)
Frequently Asked Questions
What is the severity of CVE-2023-27591?
CVE-2023-27591 has a medium severity level due to the potential exposure of sensitive metrics data.
How do I fix CVE-2023-27591?
To fix CVE-2023-27591, upgrade Miniflux to version 2.0.43 or later, ensuring the METRICS_COLLECTOR option is configured securely.
What vulnerabilities are associated with CVE-2023-27591?
CVE-2023-27591 allows unauthenticated access to Prometheus metrics, risking exposure of application performance data.
Which versions of Miniflux are affected by CVE-2023-27591?
CVE-2023-27591 affects Miniflux versions prior to 2.0.43 and versions of the Miniflux.app package up to 1.0.46.
Is CVE-2023-27591 related to any specific configuration settings?
Yes, CVE-2023-27591 is particularly relevant when the METRICS_COLLECTOR option is enabled and METRICS_ALLOWED_NETWORKS is set improperly.
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