Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in FunnelKit SlingBlocks – Gutenberg Blocks by FunnelKit (Formerly WooFunnels) allows Stored XSS.This issue affects SlingBlocks – Gutenberg Blocks by FunnelKit (Formerly WooFunnels): from n/a through 1.4.1.