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 Password Protected – Ultimate Plugin to Password Protect Your WordPress Content with Ease plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to, and including, 2.6.6 via the API. This makes it possible for authenticated attackers, with subscriber access or higher, to extract post titles and content, thus bypassing the plugin's password protection.

The Password Protected Store for WooCommerce plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to, and including, 1.9 via the REST API. This makes it possible for unauthenticated attackers to extract sensitive data including post titles and content.

The Password Protected – Ultimate Plugin to Password Protect Your WordPress Content with Ease plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the Google Captcha Site Key in all versions up to, and including, 2.6.6 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level access, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This only affects multi-site installations and installations where unfiltered_html has been disabled.

Auth. (admin+) Stored Cross-Site Scripting (XSS) vulnerability in WPExperts Password Protected plugin <= 2.6.2 versions.