source: http://www.securityfocus.com/bid/46000/info

The WP Publication Archive Plugin for WordPress is prone to an information-disclosure vulnerability because it fails to sufficiently validate user-supplied data.

An attacker can exploit this issue to download arbitrary files from the affected application. This may allow the attacker to obtain sensitive information; other attacks are also possible.

WP Publication Archive 2.0.1 is vulnerable; other versions may also be affected. 

http://www.example.com/wordpress/wp-content/plugins/wp-publication-archive/includes/openfile.php?file=../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../../windows/win.ini