Helpful < 4.5.15 - Votes Tampering

The plugin allowed users to vote more than once, which could allow attackers to increase votes drastically on some posts...

WordPress Helpful Plugin <= 4.5.14 - Vote Tampering Vulnerability

Vote Tampering vulnerability discovered by Suriya Prakash, Arun Nithyanandam, SaiManoj in Helpful plugin versions = 4.5.14 Solution Update the WordPress Helpful plugin to the latest available version at least 4.5.15...