CVE-2020-35591: Pi-Hole

Medium severity, CVSS 5.4. EPSS: 1.1% chance of exploitation in the next 30 days.

Pi-hole 5.0, 5.1, and 5.1.1 allows Session Fixation. The application does not generate a new session cookie after the user is logged in. A malicious user is able to create a new session cookie value and inject it to a victim. After the victim logs in, the injected cookie becomes valid, giving the attacker access to the user's account through the active session.

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.