Update the WordPress WP-Polls plugin to the latest available version (at least 2.76.0).
Daniel Ruf discovered and reported this Bypass Vulnerability vulnerability in WordPress WP-Polls Plugin. A bypass vulnerability could allow a malicious actor to bypass certain restrictions in the code. For example a way to bypass certain authorization checks which might allow a malicious actor to gain access to the admin panel. This vulnerability has been fixed in version 2.76.0.