The present disclosure is drawn to systems, methods, and computer-readable media for mitigating cookie-injection and cookie-replaying attacks using a VPN client. The VPN client receives a session request regarding access to a private intranet. In response to the request, the VPN client retrieves cookie deleting criteria, and deletes all cookies which satisfy the cookie deleting criteria. Once all cookies satisfying the cookie deleting criteria are deleted, the VPN client proceeds with the session request.