WordPress Plotly 1.0.2 Cross Site Scripting

`Details  
================  
Software: Plotly  
Version: 1.0.2  
Homepage: http://wordpress.org/plugins/wp-plotly/  
Advisory report: https://security.dxw.com/advisories/stored-xss-in-plotly-allows-less-privileged-users-to-insert-arbitrary-javascript-into-posts/  
CVE: CVE-2015-5484  
CVSS: 6.5 (Medium; AV:N/AC:L/Au:S/C:P/I:P/A:P)  
  
Description  
================  
Stored XSS in Plotly allows less privileged users to insert arbitrary JavaScript into posts  
  
Vulnerability  
================  
This plugin allows users who do not have the unfiltered_html capability to insert JavaScript into posts/pages which gets executed by the browsers of other users.  
On single sites, only Administrators have the unfiltered_html capability, and on multisite, only Super Admins have this capability. This means that e.g. malicious Admins on a multisite, or malicious Editors would be able to perform XSS attacks against other site users and visitors.  
  
Proof of concept  
================  
  
Create a new post as a user (without the unfiltered_html capability)  
Switch to text mode  
Place this link on a line by itself: https://plot.ly/~a/’onerror=’alert(1)’>  
View the post  
  
  
Mitigations  
================  
Upgrade to version 1.0.3 or later.  
N.B. If all accounts are trusted, or all accounts have the unfiltered_html capability, then there is no issue.  
  
Disclosure policy  
================  
dxw believes in responsible disclosure. Your attention is drawn to our disclosure policy: https://security.dxw.com/disclosure/  
  
Please contact us on [email protected] to acknowledge this report if you received it via a third party (for example, [email protected]) 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  
================  
  
2015-06-04: Discovered  
2015-07-09: Reported to vendor via the contact form on the Plotly Enterprise site  
2015-07-09: Requested CVE  
2015-07-10: Vendor responded and confirmed fixed in 1.0.3  
2015-07-13: Published  
  
  
  
Discovered by dxw:  
================  
Tom Adams  
Please visit security.dxw.com for more information.  
  
  
  
  
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