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.

CVSS 3.1

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

EPSS

0.2% chance of exploitation in the next 30 days; higher than 8% of CVEs (scores of 2026-10-26)

CWE

CWE-79

Published

2026-04-06

Modified

2026-10-26

Record from

the NVD, synced 2026-10-26

Affected

• pi-hole:web_interface

References

• https://github.com/pi-hole/web/security/advisories/GHSA-7xqw-r9pr-qv59
• https://github.com/pi-hole/web/security/advisories/GHSA-7xqw-r9pr-qv59

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