Sidebar Widgets by CodeLights <= 1.4 - Contributor+ Stored XSS

The plugin does not validate and escape some of its shortcode attributes before outputting them back in the page, which could allow users with a role as low as a contributor to perform Stored Cross-Site Scripting attacks, which could be used against high-privilege users such as admins.

Insert the following shortcode in a post:

[wp_show_posts id='1' settings='inner_wrapper=div+onmouseover=alert(1)']