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WordPress Advanced Custom Fields: Table Field 1.1.12 XSS

WordPress Advanced Custom Fields: Table Field 1.1.12 XSS
Posted Aug 13, 2016
Authored by Tom Adams

WordPress Advanced Custom Fields: Table Field plugin version 1.1.12 suffers from a persistent cross site scripting vulnerability.

tags | exploit, xss
MD5 | 399a490851ed1860be6050000df8d27c

WordPress Advanced Custom Fields: Table Field 1.1.12 XSS

Change Mirror Download
Details
================
Software: Advanced Custom Fields: Table Field
Version: 1.1.12
Homepage: https://wordpress.org/plugins/advanced-custom-fields-table-field/
Advisory report: https://security.dxw.com/advisories/xss-in-advanced-custom-fields-table-field-could-allow-authenticated-users-to-do-almost-anything-an-admin-user-can/
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 haveA permission to edit posts) to inject JavaScript into pages within /wp-admin/. ThisA means aA user canA exceed their privileges by creating a script that causes an adminas browser to perform an action,A 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 a<script>alert(1)</script>a 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 toA versionA 1.1.13 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
================

2016-07-13: Discovered
2016-07-13: Reported to vendor byA email
2016-07-13: Requested CVE
2016-07-13: Vendoras autoresponder saidA 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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