Input validation vulnerability in WP-SVG 0.9

The WP-SVG plugin used in WordPress has a security issue where it is vulnerable to a type of hacking called Stored Cross-Site Scripting. This can happen in all versions of the plugin up to version 0.9. The problem is caused by not properly checking and filtering information that users input, which allows hackers to insert harmful scripts into web pages. This can affect anyone who visits the infected page, even if they are not the intended target.