cvedb.io
CVE-2026-33406
MEDIUM · CVSS 5.4
EPSS exploitation probability: 0%
Published 2026-04-06T15:17:10.627 · Last modified 2026-06-17T10:37:26.320

Summary

Pi-hole Admin Interface is a web interface for managing Pi-hole, a network-level ad and internet tracker blocking application. From 6.0 to before 6.5, configuration values from the /api/config endpoint are placed directly into HTML value="" attributes without escaping in settings-advanced.js, enabling HTML attribute injection. A double quote in any config value breaks out of the attribute context. JavaScript execution is blocked by the server's CSP (script-src 'self'), but injected attributes can alter element styling for UI redressing. The primary attack vector is importing a malicious teleporter backup, which bypasses per-field server-side validation. This vulnerability is fixed in 6.5.

Affected products

pi-hole — web_interface

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.