CVE-2020-35592: Pi-Hole

Medium severity, CVSS 5.4. EPSS: 0.9% chance of exploitation in the next 30 days.

Pi-hole 5.0, 5.1, and 5.1.1 allows XSS via the Options header to the admin/ URI. A remote user is able to inject arbitrary web script or HTML due to incorrect sanitization of user-supplied data and achieve a Reflected Cross-Site Scripting attack against other users and steal the session cookie.

Affected products

• Pi-hole Pi-Hole: version 5.0 only; version 5.1 only; version 5.1.1 only

Published 2021-02-18. Last modified 2026-06-17.