PT-2011-33: URL redirector abuse in Citrix XenServer Web Self Service

Vulnerable software

Citrix XenServer Web Self Service
Version: 1.1 and earlier


Severity level

Severity level: Medium
Impact: Phishing
Access Vector: Remote

CVSS v2:
Base Score: 4.3
Vector: (AV:N/AC:M/Au:N/C:P/I:N/A:N)

CVE: not assigned


Vulnerability description

The specialists of the Positive Research center have detected "URL redirector abuse" vulnerability in Citrix XenServer Web Self Service.

URL redirector (GET parameter page of the login page) allows forwarding to an arbitrary location. It allows an attacker to conduct a phishing attack.

How to fix

Update your software up to the latest version

Advisory status

10.11.2011 - Vendor is notified
10.11.2011 - Vendor gets vulnerability details
10.03.2012 - Vendor releases fixed version and details
28.09.2012 - Public disclosure


The vulnerability has discovered by Ilya Smith, Maxim Tsoy, Positive Research Center (Positive Technologies Company)


Reports on the vulnerabilities previously discovered by Positive Research: