Vulnerability ID: HTB22969 Reference: http://www.htbridge.ch/advisory/csrf_cross_site_request_forgery_in_vcalendar.html Product: VCalendar Vendor: UltraApps ( http://ultraapps.com ) Vulnerable Version: 1.1.5 Vendor Notification: 21 April 2011 Vulnerability Type: CSRF (Cross-Site Request Forgery) Risk level: Low Credit: High-Tech Bridge SA Security Research Lab ( http://www.htbridge.ch/advisory/ ) Vulnerability Details: The vulnerability exists due to failure in the "/admin/users_maint.php" script to properly verify the source of HTTP request. 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. Attacker can use browser to exploit this vulnerability. The following PoC is available: