Pi-hole Admin Interface XSS Vulnerabilities

Reflected DOM-based XSS in Pi-hole Admin Interface versions 6.0 through 6.4 allows unauthenticated attackers to inject arbitrary HTML via a crafted malicious URL targeting the file parameter in taillog.js, potentially enabling credential exfiltration through injected form elements due to a missing form-action Content-Security-Policy directive; fixed in version 6.5.

Stored cross-site scripting (XSS) via HTML attribute injection in Pi-hole Admin Interface versions 6.0 through 6.4 allows unauthenticated remote attackers to perform UI redressing and information disclosure by injecting double quotes into configuration values displayed in settings-advanced.js, exploitable through malicious teleporter backup imports that bypass server-side field validation.

Pi-hole Admin Interface versions 6.0 through 6.4 fail to escape client hostnames and IP addresses from the FTL database when rendering them into the DOM in the Network page and Dashboard chart tooltips, enabling stored cross-site scripting (XSS) attacks. An authenticated admin with high privileges can inject malicious scripts that execute in the context of other administrators' browsers, though the attack requires initial compromise of a DHCP/DNS client hostname field and circumvention of upstream validation in dnsmasq and FTL. This vulnerability is fixed in version 6.5, and no public exploit code or active exploitation has been identified at the time of analysis.