CVE-2026-33405: Pi-hole Web Interface

Medium severity, CVSS 4.8. EPSS: 0.3% chance of exploitation in the next 30 days.

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, the formatInfo() function in queries.js renders data.upstream, data.client.ip, and data.ede.text into HTML without escaping when a user expands a query row in the Query Log, enabling stored HTML injection. JavaScript execution is blocked by the server's CSP (script-src 'self'). The same fields are properly escaped in the table view (rowCallback), confirming the omission was an oversight. This vulnerability is fixed in 6.5.

Affected products

• Pi-hole Web Interface: from 6.0, up to and including 6.4.1

Published 2026-04-06. Last modified 2026-06-17.