The Minimal Coming Soon – Coming Soon Page plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the validate_ajax, deactivate_ajax, and save_ajax functions in all versions up to, and including, 2.38. This makes it possible for authenticated attackers, with Subscriber-level access and above, to edit the license key, which could disable features of the plugin.
https://plugins.trac.wordpress.org/changeset/3099123/
https://github.com/swisskyrepo/PayloadsAllTheThings/blob/master/CRLF%20Injection/README.md