Details ================ Software: Advanced Custom Fields: Table Field Version: 1.1.12 Homepage: http://ift.tt/1Cc8RD6 Advisory report: http://ift.tt/2aZHPYj CVE: Awaiting assignment CVSS: 4.9 (Medium; AV:N/AC:M/Au:S/C:P/I:P/A:N) Description ================ Stored XSS in Advanced Custom Fields: Table Field allows authenticated users to do almost anything an admin user can Vulnerability ================ This plugin allows users (who have permission to edit posts) to inject JavaScript into pages within /wp-admin/. This means a user can exceed their privileges by creating a script that causes an admin’s browser to perform an action, such as creating a new admin user, deleting all posts, etc. Proof of concept ================ Add a new ACF field group Add a new table-type field to that field group Create a new post/page, wherever the field group is set to display Enter “” into a field and save the post Visit the page again, and the injected JavaScript will be executed Tested with ACF PRO v5. Not tested with v4. Mitigations ================ Update to version 1.1.13 or later. 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 ================ 2016-07-13: Discovered 2016-07-13: Reported to vendor by email 2016-07-13: Requested CVE 2016-07-13: Vendor’s autoresponder said they were unavailable until 1st August 2016-08-01: Vendor reported they were working on a fix 2016-08-01: Vendor reported issue fixed in 1.1.13 2016-08-08: Advisory published Discovered by dxw: ================ Tom Adams Please visit security.dxw.com for more information.
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