What potential security risks are involved in using the exec() function in PHP?

Using the exec() function in PHP can pose security risks as it allows for the execution of system commands. This can lead to command injection vulnerabilities if user input is not properly sanitized or validated. To mitigate this risk, it is important to sanitize user input and use escapeshellarg() or escapeshellcmd() functions to escape any user-supplied arguments. 

$user_input = $_POST['input'];
$escaped_input = escapeshellarg($user_input);
exec("command " . $escaped_input);

Keywords

exec function security risks PHP command injection code execution

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