-page-....-2f-2f....-2f-2f....-2f-2fetc-2fpasswd Exclusive

. It occurs when a web application takes user-supplied input and passes it directly to a file-handling function (like PHP's ) without proper sanitization. The Expectation : The server expects a request like ?page=contact.php and looks for it in /var/www/html/pages/ The Reality : The attacker sends ?page=../../../../etc/passwd The Result

: This is a common "bypass" technique for ../ (parent directory). By using multiple dots or specific encoding, attackers try to trick security filters that only look for the standard ../ pattern. -page-....-2F-2F....-2F-2F....-2F-2Fetc-2Fpasswd

: The industry-standard "paper" for understanding this vulnerability. It provides a comprehensive overview of how "dot-dot-slash" sequences are used to access files outside the web root. By using multiple dots or specific encoding, attackers

The purpose of this report is to analyze the provided string as a , explain: The purpose of this report is to analyze

If an attacker requests: index.php?page=../../../../etc/passwd

Validate that the input contains only allowed characters (e.g., alphanumeric only). Sanitize Inputs: Strip .. and slash characters from input.

: Ensure your web server does not have permission to access sensitive files like /etc/passwd .