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Sense of Security – Security Advisory – SOS-09-001 – Libero Cross-Site Scripting Vulnerability


Sense of Security – Security Advisory – SOS-09-001

Release Date. 23-Feb-2009
Last Update. 23-Feb-2009
Vendor Notification Date. 20-Oct-2008
Product. Libero
Platform. Windows (verified), possibly others
Affected versions. Libero v5.3 SP5 (verified), possibly others.
Severity Rating. Medium
Impact. Cookie/credential theft
Loss of confidentiality
Attack Vector. Remote
Solution Status. Vendor patch not yet available
CVE reference. CVE-2009-0540



Libero is a library management system. During an application penetration test Sense of Security identified a cross-site scripting vulnerability in the search feature of the Libero web application. This occurred as a result of the application not properly filtering HTML tags which allowed malicious Javascript to be embedded. When input is incorrectly validated and not properly sanitised and then displayed in a web page, attackers can trick users into viewing the web page and causing malicious code to be executed.


Proof of concept.

You can test the susceptibility of your system to this issue by entering the following string into the search term form field and clicking ‘search’.




A vulnerable site will return the users. session ID.



The vendor has advised that the fix will be made available in Libero v5.5 SP1. A fix will not be made available for previous versions.


Discovered by.

Oliver Greiter from SOS Labs.