Missing Authorization vulnerability in Syed Balkhi Smash Balloon Social Post Feed custom-facebook-feed allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Smash Balloon Social Post Feed: from n/a through <= 4.3.2.

The Smash Balloon Social Post Feed WordPress plugin before 4.1.6 does not validate and escapes 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 against logged-in admins.

The Smash Balloon Social Post Feed WordPress plugin before 4.1.1 was affected by a reflected XSS in custom-facebook-feed in cff-top admin page.

The Smash Balloon Social Post Feed WordPress plugin before 4.0.1 did not have any privilege or nonce validation before saving the plugin's setting. As a result, any logged-in user on a vulnerable site could update the settings and store rogue JavaScript on each of its posts and pages.

The Smash Balloon Social Post Feed WordPress plugin before 2.19.2 does not sanitise or escape the feedID POST parameter in its feedlocator AJAX action (available to both authenticated and unauthenticated users) before outputting a truncated version of it in the admin dashboard, leading to an unauthenticated Stored Cross-Site Scripting issue which will be executed in the context of a logged in administrator.