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Date: Mon, 13 Jul 2015 15:14:55 +0000
From: dxw Security <>
Subject: [FD] Stored XSS in Plotly allows less privileged users to insert
	arbitrary JavaScript into posts (WordPress plugin)

Software: Plotly
Version: 1.0.2
Advisory report:
CVE: CVE-2015-5484
CVSS: 6.5 (Medium; AV:N/AC:L/Au:S/C:P/I:P/A:P)

Stored XSS in Plotly allows less privileged users to insert arbitrary JavaScript into posts

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:’onerror=’alert(1)’>
View the post

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:

Please contact us on to acknowledge this report if you received it via a third party (for example, 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.


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 for more information.

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