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TI-2026-25801 Aliases CVE-2026-33404

Pi-hole has a Stored XSS / HTML injection in the Network page/Dashboard

Priority MEDIUM 60CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
Low · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-79.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.0015 4th percentileScored 2026-11-07
Fix Fixed web (pi-hole): 6.5

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Pi-holeweb6.0 to before 6.56.5Patch availableCNA
  • web VendorPi-hole Affected 6.0 to before 6.5 Fixed in 6.5 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:pi-hole:web_interface:*:*:*:*:*:*:*:*6.0 – 6.4.1VulnerablePi-hole
  • cpe:2.3:a:pi-hole:web_interface:*:*:*:*:*:*:*:* Versions 6.0 – 6.4.1 Vulnerable ·Pi-hole

Remediation

  • Fix · CNA web (pi-hole) Fixed in 6.5

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-33404

References

Advisory 1

  • TI-2023-09443 Improper session handling of "Remember me for 7 days" functionality CVSS 3.1HIGH 8.8
  • TI-2025-36756 Pi-hole Admin Interface vulnerable to HTTP response header injection via CRLF injection CVSS 3.1HIGH 8.2
  • TI-2026-25803 Pi-hole has a Stored HTML attribute injection CVSS 3.1MEDIUM 6.1
  • TI-2026-25800 Pi-hole has a Reflected XSS / HTML injection in taillog.js CVSS 3.1MEDIUM 6.1
  • TI-2025-33477 Pi-hole Admin Interface vulnerable to cross-site scripting via malformed URL path on 404 error page CVSS 4.0MEDIUM 5.1
  • TI-2026-25802 Pi-hole has a Stored HTML Injection in queries.js CVSS 3.1MEDIUM 4.8
See all 15 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences