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 SIMPLE PACK plugin for WordPress is vulnerable to Information Exposure in all versions up to, and including, 3.2.1 via META description. This makes it possible for unauthenticated attackers to extract limited information about password protected posts.

The BoldGrid Easy SEO – Simple and Effective SEO plugin for WordPress is vulnerable to Information Exposure in all versions up to, and including, 1.6.14 via meta information (og:description) This makes it possible for unauthenticated attackers to view the first 130 characters of a password protected post which can contain sensitive information.

The BoldGrid Easy SEO – Simple and Effective SEO plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the meta description field in all versions up to, and including, 1.6.13 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.

Cross-Site Request Forgery (CSRF) vulnerability in David Cole Simple SEO plugin <= 2.0.25 versions.

Missing Authorization, Cross-Site Request Forgery (CSRF) vulnerability in David Cole Simple SEO (WordPress plugin) plugin <= 1.8.12 versions.

Cross-Site Request Forgery (CSRF) vulnerability in David Cole Simple SEO plugin <= 1.8.12 on WordPress allows attackers to create or delete sitemaps.

The Simple SEO plugin for WordPress is vulnerable to attribute-based stored Cross-Site Scripting in versions up to, and including 1.7.91, due to insufficient sanitization or escaping on the SEO social and standard title parameters. This can be exploited by authenticated users with Contributor and above permissions to inject arbitrary web scripts into posts/pages that execute whenever an administrator access the page.