Cross-Site Request Forgery vulnerability in Email Users WordPress Plugin

[Summer of Pwnage <lists () securify nl>]

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Cross-Site Request Forgery vulnerability in Email Users WordPress Plugin
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Julien Rentrop, July 2016

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Abstract
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It was found that the Email Users WordPress Plugin is vulnerable to
Cross-Site Request Forgery. By using this issue it is possible for an
attacker to send arbitrary (bulk) email messages to any address. In
order to exploit this issue, an attacker needs to lure a target user
into clicking a specially crafted link or visiting a malicious website
(or advertisement).

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OVE ID
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OVE-20160718-0001

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Tested versions
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This issue was successfully tested on Email Users WordPress Plugin
version 4.8.3.

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Fix
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This issue is resolved in Email Users version 4.8.4.

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Details
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https://sumofpwn.nl/advisory/2016/cross_site_request_forgery_vulnerability_in_email_users_wordpress_plugin.html

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Summer of Pwnage (https://sumofpwn.nl) is a Dutch community project. Its
goal is to contribute to the security of popular, widely used OSS
projects in a fun and educational way.