One way 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. We have now expanded that for our customers, by running plugins used by our customers, even when code in them is not updated, through the same system on a weekly basis. Through that, we caught a less serious variant of one of those vulnerabilities, an authenticated arbitrary file upload vulnerability in the plugin Elite Licenser Lite.

Based on what we saw with the code we reviewed as part of that vulnerability, there appear to be other security issues in the plugin. [Read more]