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Monday, July 13, 2015

[FD] Stored XSS in Plotly allows less privileged users to insert arbitrary JavaScript into posts (WordPress plugin)

Details ================ Software: Plotly Version: 1.0.2 Homepage: http://ift.tt/1M2GtYv Advisory report: http://ift.tt/1O2fevn 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: http://ift.tt/1M2GtaE’> 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: http://ift.tt/1B6NWzd 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 ================ 2015-06-04: 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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