Input validation vulnerability in flowpaper 1.9.9

The flowpaper plugin for WordPress has a security vulnerability that can allow attackers to insert malicious scripts into pages. This vulnerability affects versions up to and including 1.9.9 of the plugin. The vulnerability is present because the plugin does not properly filter user input or escape output. Attackers with contributor-level access or higher can exploit this vulnerability by inserting malicious scripts into pages. These scripts will execute every time someone visits the page.