CVE-2026-33403 Details
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.
A reflected DOM-based cross-site scripting vulnerability has been identified in the Pi-hole Admin Interface versions 6.0 prior to 6.5. This vulnerability allows an unauthenticated attacker to inject arbitrary HTML into the admin interface by crafting a malicious URL. The issue arises in 'taillog.js', where the 'file' query parameter is inserted into the DOM via 'innerHTML' without proper escaping. The absence of a 'form-action' directive in the Content-Security-Policy (CSP) enables injected forms to exfiltrate credentials to an external origin. This vulnerability is patched in Pi-hole version 6.5.
Users can update to Pi-hole version 6.5, which addresses this vulnerability.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Apr 6, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/pi-hole/web/security/advisories/GHSA-7xqw-r9pr-qv59 | CISA-ADP | Vendor Advisory |
| https://github.com/pi-hole/web/security/advisories/GHSA-7xqw-r9pr-qv59 | [email protected] | Vendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-79 | Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| pi-hole web interface | >= 6.0, <= 6.4.1 |
CPE
Remediation
| |
Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Apr 10, 2026 | Initial Analysis | [email protected] |
| Apr 6, 2026 | CVE Modified | CISA-ADP |
| Apr 6, 2026 | New CVE Received | [email protected] |