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For our thirteenth security review of a plugin based on the voting of our customers, we reviewed the plugin wpDataTables Lite.
One of things we do to keep track of what vulnerabilities are out there in WordPress plugins, to provide our customers with the best data on them, is to monitor our websites for hacking attempts. In September we had request that looked like probing for usage of the plugin wpDataTables Lite, through a request for /wp-content/plugins/wpdatatables/Licensing/GPL.txt. Though when we went to look into this we noticed the plugin hasn’t have a file at that location, so it would seem to have been a request checking for something else. It looks like the hacker was a probably probing for usage of a page paid version of the same plugin, which had contained an arbitrary file upload vulnerability in the past. That vulnerability was due to an upload function be accessible to anyone (even if not logged in) through WordPress’ AJAX functionality. Once we saw that we took a quick look at the wpDataTables Lite to see if there were any issue along those lines and found that there is an authenticated persistent cross (XSS) vulnerability in the plugin as of version 1.1.