full-disclosure - [FD] Reflected XSS in iframe allows unauthenticated users to do almost anything an admin can (WordPress plugin)

Open Source and information security mailing list archives

Date: Mon, 10 Aug 2015 14:45:32 +0000
From: dxw Security <security@....com>
To: fulldisclosure@...lists.org
Subject: [FD] Reflected XSS in iframe allows unauthenticated users to do
	almost anything an admin can (WordPress plugin)

Details
================
Software: iframe
Version: 3.0
Homepage: http://wordpress.org/plugins/iframe/
Advisory report: https://security.dxw.com/advisories/reflected-xss-in-iframe-allows-unauthenticated-users-to-do-almost-anything-an-admin-can/
CVE: Awaiting assignment
CVSS: 5.8 (Medium; AV:N/AC:M/Au:N/C:P/I:P/A:N)

Description
================
Reflected XSS in iframe allows unauthenticated users to do almost anything an admin can

Vulnerability
================
If the “get_params_from_url” option is used in the iframe shortcode, the page/post it’s on is opened up to a reflected XSS attack.

Proof of concept
================
Paste the following into a post:
[iframe src=\"http://www.youtube.com/embed/4qsGTXLnmKs\" width=\"100%\" height=\"500\" get_params_from_url=\"1\"]
Visit the post in a browser that doesn’t attempt to mitigate XSS attacks (i.e. Firefox) and add some extra parameters:
http://localhost/2015/07/31/iframe/?a=%22%3E%3C/iframe%3E%3Cscript%3Ealert(`hello%20world`)%3C/script%3E

Mitigations
================
Upgrade to version 4.0 or later
If this is not possible, ensure that the ‘get_params_from_url’ argument is never used in the shortcode.

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

2015-07-31: Discovered
2015-08-05: Reported to vendor via web form on http://web-profile.com.ua/feedback/
2015-08-06: Vendor responded
2015-08-10: Vendor reported fixed in version 4.0
2015-08-10: Published

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

_______________________________________________
Sent through the Full Disclosure mailing list
https://nmap.org/mailman/listinfo/fulldisclosure
Web Archives & RSS: http://seclists.org/fulldisclosure/

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives