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Vulnerability record · CVE-2026-33404 · published 6 April 2026

CVE-2026-33404: Pi-hole web interface cross-site scripting vulnerability

Pi Hole · Web Interface

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, client hostnames and IP addresses from the FTL database are rendered into the DOM without escaping in network.js (Network page) and charts.js/index.js (Dashboard chart tooltips). While upstream validation in dnsmasq and FTL blocks HTML characters via normal DHCP/DNS paths, the web UI performs no output escaping — an inconsistency with other fields in the same file that are properly escaped. This vulnerability is fixed in 6.5.

6.1 CVSS 3.1 Medium EPSS 0.25% · top 85.5% CWE-79 · Cross-site scripting
6.1CVSS 3.1 base score
0.25%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
1References
17 Jun 2026Last modified by NVD

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, client hostnames and IP addresses from the FTL database are rendered into the DOM without escaping in network.js (Network page) and charts.js/index.js (Dashboard chart tooltips). While upstream validation in dnsmasq and FTL blocks HTML characters via normal DHCP/DNS paths, the web UI performs no output escaping — an inconsistency with other fields in the same file that are properly escaped. This vulnerability is fixed in 6.5.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/pi-hole/web/security/advisories/GHSA-px6w-85wp-ww9v Third Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

8.9CVE-2026-33765Pi-hole web interface os command injection vulnerabilityPi-hole Admin Interface is a web interface for managing Pi-hole, a network-level ad and internet tracker blocking application. Versions prior to 6.0 …EPSS 1.8%8.8CVE-2023-23614Pi-hole web interface insufficient session expiration vulnerabilityPi-hole®'s Web interface (based off of AdminLTE) provides a central location to manage your Pi-hole. Versions 4.0 and above, prior to 5.18.3 are vuln…EPSS 0.97%8.8CVE-2021-29448Pi-hole ftldns cross-site scripting vulnerabilityPi-hole is a Linux network-level advertisement and Internet tracker blocking application. The Stored XSS exists in the Pi-hole Admin portal, which ca…EPSS 0.67%8.2CVE-2025-59151Pi-hole web interface vulnerabilityPi-hole Admin Interface is a web interface for managing Pi-hole, a network-level advertisement and internet tracker blocking application. Pi-hole Adm…EPSS 0.44%7.5CVE-2021-3706Pi-hole web interface incorrect permission assignment vulnerabilityadminlte is vulnerable to Sensitive Cookie Without 'HttpOnly' FlagEPSS 1.1%6.1CVE-2026-33403Pi-hole web interface cross-site scripting vulnerabilityPi-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…EPSS 0.32%6.1CVE-2026-33406Pi-hole web interface cross-site scripting vulnerabilityPi-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…EPSS 0.37%6.1CVE-2021-3811Pi-hole web interface cross-site scripting vulnerabilityadminlte is vulnerable to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')EPSS 0.55%

Source: NIST National Vulnerability Database (record CVE-2026-33404), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.