YUI 'uploader.swf' Cross Site Scripting Vulnerability

Bugtraq ID:	63660
Class:	Input Validation Error
CVE:	CVE-2013-6780
Remote:	Yes
Local:	No
Published:	Nov 11 2013 12:00AM
Updated:	Apr 13 2015 08:44PM
Credit:	@soiaxx
Vulnerable:	Yahoo! YUI 2.8.1 Yahoo! YUI 2.5.2 Yahoo! YUI 2.8.0 Yahoo! YUI 2.7.0 Yahoo! YUI 2.6.0 Yahoo! YUI 2.5.1 Yahoo! YUI 2.5.0
Not Vulnerable:

YUI 'uploader.swf' Cross Site Scripting Vulnerability

YUI is prone to a cross-site scripting vulnerability because it fails to sufficiently sanitize user-supplied input.

An attacker may leverage this issue to execute arbitrary script code in the browser of an unsuspecting user in the context of the affected site. This may allow the attacker to steal cookie-based authentication credentials and launch other attacks.

YUI 2.5.0 through 2.9.0 versions are vulnerable.

YUI 'uploader.swf' Cross Site Scripting Vulnerability

To exploit this issue an attacker must entice an unsuspecting victim to follow a malicious URI.

The following example URI is available:

http://www.example.com/uploader.swf?allowedDomain=\%22}%29%29%29}catch%28e%29{alert%28document.domain%29;}//

YUI 'uploader.swf' Cross Site Scripting Vulnerability

Solution:
Updates are available. Please see the references or vendor advisory for more information.

YUI 'uploader.swf' Cross Site Scripting Vulnerability

References:

• YUI Library Homepage (YUI Library)