Multiple Plugins by emarket-design <= Multiple Versions - Unauthenticated Limited Remote Code Execution

Multiple plugins for WordPress by emarket-design with the 'emd-form-builder-lite' package are vulnerable to Remote Code Execution in various versions via the emd_form_builder_lite_pagenum function. This is due to the plugin not properly validating user input before using it as a function name. This makes it possible for unauthenticated attackers to execute code on the server, however, parameters can not be passed to the functions called

Requests carrying this pattern arrive without a session, so nothing upstream of the firewall gets a chance to reject them: WordSec's web application firewall inspects request payloads before WordPress loads them. Classes like this one can leave something behind, so the staged malware scanner is the second half: it looks for dropped files and modified code rather than for the request that created them. None of that substitutes for the fix: Customer Support Ticket System & Helpdesk 6.0.3 closes this, and updating the plugin is the step that ends it.

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