Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability in YAHMAN Word Balloon allows PHP Local File Inclusion.This issue affects Word Balloon: from n/a through 4.21.1.

The Word Balloon WordPress plugin before 4.20.3 does not protect some of its actions against CSRF attacks, allowing an unauthenticated attacker to trick a logged in user to delete arbitrary avatars by clicking a link.

The Word Balloon WordPress plugin before 4.19.3 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.