The Freemius SDK, as used by hundreds of WordPress plugin and theme developers, was vulnerable to Cross-Site Request Forgery and Information disclosure due to missing capability checks and nonce protection on the _get_debug_log, _get_db_option, and the _set_db_option functions in versions up to, and including 2.4.2. Any WordPress plugin or theme running a version of Freemius less than 2.4.3 is vulnerable.

The Stackable – Page Builder Gutenberg Blocks plugin for WordPress is vulnerable to CSS Injection in all versions up to, and including, 3.13.6. This makes it possible for unauthenticated attackers to embed untrusted style information into comments resulting in a possibility of data exfiltration such as admin nonces with limited impact. These nonces could be used to perform CSRF attacks within a limited time window. The presence of other plugins may make additional nonces available, which may pose a risk in plugins that don't perform capability checks to protect AJAX actions or other actions reachable by lower-privileged users.

The GutenKit – Page Builder Blocks, Patterns, and Templates for Gutenberg Block Editor plugin for WordPress is vulnerable to arbitrary file uploads due to a missing capability check on the install_and_activate_plugin_from_external() function (install-active-plugin REST API endpoint) in all versions up to, and including, 2.1.0. This makes it possible for unauthenticated attackers to install and activate arbitrary plugins, or utilize the functionality to upload arbitrary files spoofed like plugins.

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in PickPlugins Post Grid and Gutenberg Blocks allows Stored XSS.This issue affects Post Grid and Gutenberg Blocks: from n/a through 2.2.89.

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Leap13 Premium Blocks – Gutenberg Blocks for WordPress allows Stored XSS.This issue affects Premium Blocks – Gutenberg Blocks for WordPress: from n/a through 2.1.33.

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in WPDeveloper Essential Blocks for Gutenberg allows Stored XSS.This issue affects Essential Blocks for Gutenberg: from n/a through 4.8.4.

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in WP Travel WP Travel Gutenberg Blocks allows Stored XSS.This issue affects WP Travel Gutenberg Blocks: from n/a through 3.6.0.

The GutenGeek Free Gutenberg Blocks for WordPress plugin for WordPress is vulnerable to Stored Cross-Site Scripting via SVG File uploads in all versions up to, and including, 1.1.3 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Author-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses the SVG file.

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in ThemeHunk Gutenberg Blocks – Unlimited blocks For Gutenberg allows Stored XSS.This issue affects Gutenberg Blocks – Unlimited blocks For Gutenberg: from n/a through 1.2.7.

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in WP Travel WP Travel Gutenberg Blocks allows Stored XSS.This issue affects WP Travel Gutenberg Blocks: from n/a through 3.5.1.