File inclusion Security Vulnerability

Description
A script includes a file which name is determined using user-supplied data and the user input is not properly validated before being passed to the inlcude function.

Impact
It is possible for a remote attacker to include a file from local or remote resources and/or execute arbitrary script code with the privileges of the webserver.

References
PHP - Using remote files
Code Injection Vulnerabilities Explained
OWASP PHP Top 5

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