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Description

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.

PUBLISHED Reserved 2026-03-19 | Published 2026-04-06 | Updated 2026-04-06 | Assigner GitHub_M




MEDIUM: 6.1CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Problem types

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Product status

>= 6.0, < 6.5
affected

References

github.com/...le/web/security/advisories/GHSA-7xqw-r9pr-qv59 exploit

github.com/...le/web/security/advisories/GHSA-7xqw-r9pr-qv59

cve.org (CVE-2026-33403)

nvd.nist.gov (CVE-2026-33403)

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