XSS in Pi-Hole Web
CVE-2025-53533
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.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.006 (47.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 47th percentile — 47.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: +0.000
Affected products
- Pi-Hole Web — versions < 6.3
- Pi-Hole Web Interface
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/pi-hole/web/security/advisories/GHSA-w8f8-92rx-4f6w (Exploit, Vendor Advisory)
Frequently asked questions
- What is CVE-2025-53533?
- CVE-2025-53533 is a medium-severity vulnerability in Pi-Hole Web, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2025-10-27.
- How severe is CVE-2025-53533?
- Medium severity. CVSS v3 base score is 6.1 out of 10.
- Is CVE-2025-53533 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.