WordPress Newsletter Manager Plugin Cross-Site Scripting and Request Forgery Vulnerabilities
Description
Two vulnerabilities have been discovered in the Newsletter Manager plugin for WordPress, which can be exploited by malicious people to conduct cross-site scripting and request forgery attacks.
1) Input passed via the "id" parameter to wp-admin/admin.php (when "page" is set to "newsletter-manager-emailcampaigns") is not properly sanitised in wp-content/plugins/newsletter-manager/admin/test_mail.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.
2) The application allows users to perform certain actions via HTTP requests without performing any validity checks to verify the requests. This can be exploited to e.g. change an email address and conduct script insertion attacks by tricking a logged in administrator into visiting a malicious web site.
The vulnerabilities are confirmed in version 1.0.2. Other versions may also be affected.
Edit the source code to ensure that input is properly sanitised. Do not browse untrusted websites or follow untrusted links while logged in to the application.