What Are Local File Inclusion and Remote File Inclusion?

You can view security events such as file inclusion in WAF protection events to quickly locate attack sources or analyze attack events.

Program developers write repeatedly used functions into a single file. When such functions need to be used, the file is directly invoked. The file invoking process is called file inclusion. File inclusion vulnerabilities are classified into two categories, based on whether the file is a remotely hosted file or a local file available on the web server:

• Local file inclusion
• Remote file inclusion

A file inclusion vulnerability allows an attacker to access unauthorized or sensitive files available on the web server or to execute malicious files on the web server by using such a file. This vulnerability is mainly due to a bad input validation mechanism, wherein the user's input that is passed to the file include commands without proper validation. The impact of this vulnerability can lead to malicious code execution on the server or reveal data present in sensitive files.