Description
WordPress Plugin Email Templates is prone to an HTML injection vulnerability because it fails to properly sanitize user-supplied input. Attacker supplied HTML and script code would run in the context of the affected browser, potentially allowing the attacker to steal cookie-based authentication credentials or control how the site is rendered to the user; other attacks are also possible. WordPress Plugin Email Templates version 1.3 is vulnerable; prior versions may also be affected.
Remediation
Update to plugin version 1.3.1 or latest
References
https://blog.nintechnet.com/multiple-wordpress-plugins-vulnerable-to-html-injection/
https://plugins.svn.wordpress.org/email-templates/trunk/README.txt
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