medium6.1
CVE-2026-33403
Pi-hole Admin Interface is a web interface for managing Pi-hole, a network-level ad and internet tracker blocking application.
Impact
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, a reflected DOM-based XSS vulnerability in taillog.js allows an unauthenticated attacker to inject arbitrary HTML into the Pi-hole admin interface by crafting a malicious URL. The file query parameter is interpolated into an innerHTML assignment without escaping. Because the Content-Security-Policy is missing the form-action directive, injected <form> elements can exfiltrate credentials to an external origin. This vulnerability is fixed in 6.5.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Pi-Hole | Web Interface | from 6.0 through 6.4.1 |