The Sassy Social Share plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'urls' parameter called via the 'heateor_sss_sharing_count' AJAX action in versions up to, and including, 3.3.3 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link.

The Social Sharing WordPress plugin before 3.3.45 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 contributor to perform Stored Cross-Site Scripting attacks which could be used against high privilege users such as admins.

The Social Sharing Plugin WordPress plugin before 3.3.40 does not escape the viewed post URL before outputting it back in onclick attributes when the "Enable 'More' icon" option is enabled (which is the default setting), leading to a Reflected Cross-Site Scripting issue.