Umbraco CMS SeoChecker Plugin 1.9.2 - Cross-Site Scripting

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# Author Information #
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Author : Ahmed Elhady Mohamed
twitter : @Ahmed__ELhady
Date : 01/07/2018
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# Software Information #
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Affected Software : SeoChecker Umbraco CMS Plug-in
Version: version 1.9.2 
Software website  : https://soetemansoftware.nl/seo-checker

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# Description #
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SeoChecker Umbraco CMS Plug-in version 1.9.2 is vulnerable to stored cross-site scripting vulnerability in two parameters 
which are SEO title and SEO description HTML parameters fields. A low privilege authenticated user who can edit the SEO tab
parameter value for any Ubmraco CMS content like an article will be able to inject a malicious code to execute arbitrary HTML
and JS code in a user's browser session in the context of an affected site. so when a high privilege user tries to access/edit 
the article content. the JS code will be executed. The vulnerabilities are tested on 1.9.2 version and Other versions may also be affected.


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# Exlpoit Steps #
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1- Access the application with a low privilege authenticated user
2- Go to the SEO tab for any article
3-Enter the following payload in SEO title and SEO description HTML parameters fields parameters 
"><script>alert(123)</script>
4- Access the article content page to edit and change contents value.  
5- The JS code will be executed.