HTB22873: XSS in Inline Gallery wordpress plugin

Vulnerability ID: HTB22873
Reference: http://www.htbridge.ch/advisory/xss_in_inline_gallery_wordpress_plugin.html
Product: Inline Gallery wordpress plugin
Vendor: m0n5t3r ( http://m0n5t3r.info/work/wordpress-plugins/inline-gallery/ )
Vulnerable Version: 0.3.9
Vendor Notification: 22 February 2011
Vulnerability Type: XSS (Cross Site Scripting)
Risk level: Medium
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/inline-gallery/browser/browser.php" script to properly sanitize user-supplied input in "do" variable.
User can execute arbitrary JavaScript code within the vulnerable application.
Successful exploitation of this vulnerability could result in a compromise of the application, theft of cookie-based authentication credentials, disclosure or modification of sensitive data.

The following PoC is available:

http://[host]/wp-content/plugins/inline-gallery/browser/browser.php?do=%3Cscript%3Ealert%28%22XSS%22%29;%3C/script%3E