One of the ways we help to improve the security of WordPress plugins, not just for our customers of our service, but for everyone using them, is our proactive monitoring of changes made to plugins in the Plugin Directory to try to catch serious vulnerabilities. Through that we caught an authenticated settings change vulnerability that leads to an authenticated persistent cross-site scripting (XSS) vulnerability in the plugin Yes-co ORES.

The plugin allows changing its settings through an AJAX accessible function ajaxSetSetting(). That is registered to be accessible to anyone logged in to WordPress: [Read more]