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CVE-2025-53533

Pi-hole Admin Interface vulnerable to cross-site scripting via malformed URL path on 404 error page

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 6.3
1 proof of concept on GitHub, 1 Nuclei template
  • Exploitation: poc
  • Automatable: no
  • Technical impact: partial

Summary

Pi-hole Admin Interface is a web interface for managing Pi-hole, a network-level advertisement and internet tracker blocking application. Pi-hole Admin Interface versions 6.2.1 and earlier are vulnerable to reflected cross-site scripting (XSS) via a malformed URL path. The 404 error page includes the requested path in the class attribute of the body tag without proper sanitization or escaping. An attacker can craft a URL containing an onload attribute that will execute arbitrary JavaScript code in the browser when a victim visits the malicious link. If an attacker sends a crafted pi-hole link to a victim and the victim visits it, attacker-controlled JavaScript code is executed in the browser of the victim. This has been patched in version 6.3.

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: poc · Automatable: no · Technical impact: partial

  3. Record last updated

Affected versions

  • pi-hole web

    fixed in 6.3

References 3

GitHub · pi-hole/web

GitHub · projectdiscovery/nuclei-templates

GitHub · moezbouzayani9/Pi-hole-XSS-CVE-2025-53533