grep -- '-template-\.\.-2F\.\.-2F\.\.-2F\.\.-2Froot-2F' /var/log/nginx/access.log
.. represents the "parent directory" in file system navigation.
/var/www/html/template-../../../../root/.bashrc
In web application security, input validation is the thin line between a secure system and a compromised network. Among the various input-based vulnerabilities, path traversal remains one of the most persistent threats. -template-..-2F..-2F..-2F..-2Froot-2F
This specific payload is designed to perform a attack. By using multiple sets of ../ , an attacker attempts to "break out" of the intended application folder and navigate upward through the server's file system.
The -template- prefix indicates this is not a stock, automated worm but a custom or semi-custom scan. Variants include:
Some admin panels let you view log files via a parameter like log=access.log . If the code naively appends the parameter to a base directory, the same payload can expose system logs or even the application’s own source code. grep -- '-template-\
: In regular file notation, ../ instructs the operating system to step up one level in the directory hierarchy. Many basic firewalls or naive code filters search explicitly for the string ../ to block attacks. By utilizing hex-encoded variations like ..-2F or double-encoding schemes, attackers trick web servers into passing the string past the filter before it is decoded by the file-rendering system.
When testing for path traversal, security professionals generate variations of ../ to bypass filters. The pattern is a valuable addition to their payload lists because:
/root/.ssh/id_rsa : The private SSH key for the root user, granting complete server access if found. The -template- prefix indicates this is not a
If you’re testing your own application and see such strings in logs:
: By repeating ..-2F multiple times, the attacker is attempting to "climb" out of the intended web folder and reach the server's root directory .
-template-../ ../ ../ ../root/