source: https://www.securityfocus.com/bid/21890/info
 
EditTag is prone to multiple directory-traversal vulnerabilities because the application fails to sufficiently sanitize user-supplied data.
 
Exploiting these issues may allow a remote attacker to access any file on the affected webserver. 
 
Version 1.2 is vulnerable to this issue; other versions may also be affected.

http://www.example.com/edittag/edittag.pl?file=INJECT