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.
| Software | From | Fixed in |
|---|---|---|
| pi-hole / pi-hole | 5.0 | 5.0.x |
| pi-hole / pi-hole | 5.1 | 5.1.x |
| pi-hole / pi-hole | 5.1.1 | 5.1.1.x |