HTB22840: Path disclosure in Starbox Voting wordpress plugin

Vulnerability ID: HTB22840
Reference: http://www.htbridge.ch/advisory/path_disclosure_in_starbox_voting_wordpress_plugin.html
Product: Starbox Voting wordpress plugin
Vendor: jigen.he ( http://www.sealedbox.cn/ )
Vulnerable Version: 2.0.4
Vendor Notification: 08 February 2011
Vulnerability Type: Path disclosure
Risk level: Low
Credit: High-Tech Bridge SA - Ethical Hacking & Penetration Testing (http://www.htbridge.ch/)

Vulnerability Details:
The vulnerability exists due to failure in the "/wp-content/plugins/starbox-voting/ajax.php" script, it's possible to generate an error that will reveal the full path of the script.
A remote user can determine the full path to the web root directory and other potentially sensitive information.

The following PoC is available:

http://[host]/wp-content/plugins/starbox-voting/ajax.php