Vulnerability Details CVE-2026-33403
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 17.5%
CVSS Severity
CVSS v3 Score 6.1
References
Products affected by CVE-2026-33403
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cpe:2.3:a:pi-hole:web_interface:*