A vulnerability has been discovered in the MeeNews plugin for WordPress, which can be exploited by malicious people to conduct cross-site scripting attacks.
Input passed to the "idnews" parameter in wp-admin/admin.php (when "page" is set to "newsletter_manager.php" and "acc" is set to "edit") is not properly sanitised in wp-content/plugins/meenews/inc/tpl/mee_editot_newsletter.php before being returned to the user. This can be exploited to execute arbitrary HTML and script code in a user's browser session in context of an affected site.
The vulnerability is confirmed in version 5.1.0. Other versions may also be affected.
Vulnerable Products
Vulnerable Software: MeeNews 5.x (plugin for WordPress)
Solution
Edit the source code to ensure that input is properly sanitised.