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 Supreme Modules Lite – Divi Theme, Extra Theme and Divi Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the ‘button_one_id’ parameter in all versions up to, and including, 2.5.51 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

The Elegant Themes Divi theme, Extra theme, and Divi Page Builder plugin for WordPress are vulnerable to DOM-Based Stored Cross-Site Scripting via the ‘title’ parameter in versions up to, and including, 4.25.0 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level permissions and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

The Supreme Modules Lite – Divi Theme, Extra Theme and Divi Builder plugin for WordPress is vulnerable to DOM-Based Cross-Site Scripting via the ‘typing_cursor’ parameter in versions up to, and including, 2.5.3 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level permissions and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

An issue was discovered in the Divi Builder plugin, Divi theme, and Divi Extra theme before 4.5.3 for WordPress. Authenticated attackers, with contributor-level or above capabilities, can upload arbitrary files, including .php files. This occurs because the check for file extensions is on the client side.