GS Filterable Portfolio < 1.6.1 - Contributor+ Stored XSS

The plugin does not validate and escape some of its shortcode attributes before outputting them back in a page/post where the shortcode is embed, which could allow users with the contributor role and above to perform Stored Cross-Site Scripting attacks.

PoC

Note: First, you need to add a Portfolio. [gs_portfolio hover_effect=‘" onmouseover=“alert(1)” style=“background:red;width:100px;height:100px;”’]