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WordPress 3.3.1 swfupload.swf Cross Site Scripting

🗓️ 09 Nov 2012 00:00:00Reported by MustLiveType 
packetstorm
 packetstorm
🔗 packetstormsecurity.com👁 70 Views

WordPress swfupload.swf XSS vulnerability in versions 2.5 - 3.3.

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`Hello list!  
  
I will draw your attention to XSS vulnerability in swfupload in WordPress.  
  
In April there was announced Cross-Site Scripting vulnerability in   
swfupload.swf in WordPress (CVE-2012-3414). It was fixed in WordPress 3.3.2.   
At that time there was no detailed information about it.  
  
Last week I've noticed, that people begun disclosing this XSS hole in   
swfupload.swf in other web applications (as in one WP plugin, where I found   
it). So the details of this hole was already disclosed, which leaded to new   
advisories with XSS in this flash file in other webapps.  
  
After that I've made research and here is information about different   
versions of this swf-file (with different names) and all versions of   
WordPress, which contain any of these swf-files. I.e. not one swf (mentioned   
by Neal Poole), but two swf's with different names have this XSS.  
  
This hole was found by Neal Poole and Nathan Partlan. And at 17.05.2012 Neal   
have disclosed it at his site   
(https://nealpoole.com/blog/2012/05/xss-and-csrf-via-swf-applets-swfupload-plupload/).   
Details about all affected versions of WordPress and versions of swf-file   
are provided bellow.  
  
-------------------------  
Affected products:  
-------------------------  
  
Vulnerable are versions WordPress 2.5 - 3.3.1.  
  
File swfupload.swf is bundled with WordPress 2.7 - 3.3.1.  
  
File swfupload_f9.swf is bundled with WordPress 2.5 - 2.7.1.  
  
In versions WP 2.7 - 2.7.1 both flash-files are contained.  
  
----------  
Details:  
----------  
  
XSS (WASC-08):  
  
http://site/wp-includes/js/swfupload/swfupload.swf?movieName=%22]);}catch(e){}if(!self.a)self.a=!alert(document.cookie);//  
  
WordPress 2.7-3.3.1.  
  
http://site/wp-includes/js/swfupload/swfupload_f9.swf?movieName=%22]);}catch(e){}if(!self.a)self.a=!alert(document.cookie);//  
  
WordPress 2.5-2.7.1.  
  
At 20.04.2012 this vulnerability was fixed in WordPress 3.3.2. The   
developers of WordPress released new version of flash file, which could be   
used by all web developers, which were using swfupload.  
  
Swfupload is used in WordPress, plugins for WP and in other web   
applications. There are many web applications with it, not as many as those   
which are using JW Player (http://securityvulns.com/docs28176.html) and JW   
Player Pro (http://securityvulns.com/docs28483.html) (vulnerabilities in   
them I've disclosed earlier), but still a lot of. And in the next letter   
I'll present a set of such web applications.  
  
Best wishes & regards,  
MustLive  
Administrator of Websecurity web site  
http://websecurity.com.ua   
  
`

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09 Nov 2012 00:00Current
6.4Medium risk
Vulners AI Score6.4
EPSS0.06259
70