WordPress iframe 3.0 Reflective Cross Site Scripting

2015-08-10T00:00:00
ID PACKETSTORM:133050
Type packetstorm
Reporter Tom Adams
Modified 2015-08-10T00:00:00

Description

                                        
                                            `Details  
================  
Software: iframe  
Version: 3.0  
Homepage: http://wordpress.org/plugins/iframe/  
Advisory report: https://security.dxw.com/advisories/reflected-xss-in-iframe-allows-unauthenticated-users-to-do-almost-anything-an-admin-can/  
CVE: Awaiting assignment  
CVSS: 5.8 (Medium; AV:N/AC:M/Au:N/C:P/I:P/A:N)  
  
Description  
================  
Reflected XSS in iframe allows unauthenticated users to do almost anything an admin can  
  
Vulnerability  
================  
If the “get_params_from_url” option is used in the iframe shortcode, the page/post it’s on is opened up to a reflected XSS attack.  
  
Proof of concept  
================  
Paste the following into a post:  
[iframe src=\"http://www.youtube.com/embed/4qsGTXLnmKs\" width=\"100%\" height=\"500\" get_params_from_url=\"1\"]  
Visit the post in a browser that doesn’t attempt to mitigate XSS attacks (i.e. Firefox) and add some extra parameters:  
http://localhost/2015/07/31/iframe/?a=%22%3E%3C/iframe%3E%3Cscript%3Ealert(`hello%20world`)%3C/script%3E  
  
Mitigations  
================  
Upgrade to version 4.0 or later  
If this is not possible, ensure that the ‘get_params_from_url’ argument is never used in the shortcode.  
  
Disclosure policy  
================  
dxw believes in responsible disclosure. Your attention is drawn to our disclosure policy: https://security.dxw.com/disclosure/  
  
Please contact us on security@dxw.com to acknowledge this report if you received it via a third party (for example, plugins@wordpress.org) as they generally cannot communicate with us on your behalf.  
  
This vulnerability will be published if we do not receive a response to this report with 14 days.  
  
Timeline  
================  
  
2015-07-31: Discovered  
2015-08-05: Reported to vendor via web form on http://web-profile.com.ua/feedback/  
2015-08-06: Vendor responded  
2015-08-10: Vendor reported fixed in version 4.0  
2015-08-10: Published  
  
  
  
Discovered by dxw:  
================  
Tom Adams  
Please visit security.dxw.com for more information.  
  
  
  
  
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