Pi-Hole · Pi-Hole · CVE-2026-33403
**Name of the Vulnerable Software and Affected Versions**
Pi-hole Admin Interface versions 6.0 through 6.4
**Description**
A reflected DOM-based XSS (Cross-Site Scripting) issue exists in `taillog.js`. An unauthenticated attacker can inject arbitrary HTML into the admin interface by crafting a malicious URL. This occurs because the `file` query parameter is interpolated into an `innerHTML` assignment without proper escaping. Additionally, the Content-Security-Policy lacks a `form-action` directive, which allows injected `<form>` elements to exfiltrate credentials to an external origin.
**Recommendations**
Update to version 6.5.