WordPress Core and the Gutenberg plugin for WordPress have a security vulnerability that could allow malicious web scripts to be injected onto webpages. This vulnerability affects versions of WordPress Core up to 6.0.3 and the Gutenberg plugin for WordPress up to 14.3.1. The vulnerability is caused by not properly securing user input which could make it possible for authenticated users with access to the block editor to inject malicious web scripts. The RSS widget, Search Block, Featured Image Block, RSS Block, and Navigation Block are all affected.