The same attack techniques mentione

The same attack techniques mentioned in the previous section (3rd Website Hacking) are often used. A technique similar to that of targeted-attack has also been observed with which an attacker infiltrates the internal system and steals the web site information.
 Exploitation of Vulnerability
A web service is built on not just a single software but several softwares that provide different service layers. The attacker’s prime targets are vulnerabilities of the applications specially developed for the service or vulnerabilities for generic applications such as open source software. For example, web application frameworks like Apache Struts 2 and CMS software like WordPress tend to be targeted.