CVSS: 6.5 (Medium; AV:N/AC:L/Au:S/C:P/I:P/A:P)
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 othersiteusers and visitors.
Proof of concept
Create a new post as a user (without the unfiltered_html capability)
Switch to text mode
Placethis link on a line by itself:https://plot.ly/~a/?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 theunfiltered_htmlcapability, then there is no issue.
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This vulnerability will be published if we do not receive a response to this report with 14 days.
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
Discovered by dxw:
Please visit security.dxw.com for more information.