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HTB22940: XSS in SocialGrid wordpress plugin

Vulnerability ID: HTB22940
Reference: http://www.htbridge.ch/advisory/xss_in_socialgrid_wordpress_plugin.html
Product: SocialGrid wordpress plugin
Vendor: Michael Whalen ( http://whalesalad.com ) 
Vulnerable Version: 2.3
Vendor Notification: 05 April 2011 
Vulnerability Type: XSS (Cross Site Scripting)
Risk level: Medium 
Credit: High-Tech Bridge SA Security Research Lab ( http://www.htbridge.ch/advisory/ ) 

Vulnerability Details:
The vulnerability exists due to failure in the "/wp-content/plugins/socialgrid/static/js/inline-admin.js.php" script to properly sanitize user-supplied input in "default_services" variable then register_qlobals is on.
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: