The Internet Crime Complaint Center (IC3) has issued an alert addressing recently perpetrated Web site defacements. The defacements advertise themselves as associated with the Islamic State in the Levant (ISIL) a.k.a. Islamic State of Iraq and al-Shams (ISIS). However, FBI assesses that the perpetrators are not actually associated with this group. The perpetrators exploit WordPress content management system (CMS) vulnerabilities, leading to disruptive and costly effects.