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 SEO Manager plugin for WordPress is vulnerable to Stored Cross-Site Scripting via post meta in versions up to, and including, 1.9 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers with contributor-level and above permissions to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

The importFromRedirection AJAX action of the SEO Redirection Plugin – 301 Redirect Manager WordPress plugin before 8.2, available to any authenticated user, does not properly sanitise the offset parameter before using it in a SQL statement, leading an SQL injection when the redirection plugin is also installed