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 Image Watermark plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the watermark_action_ajax() function in all versions up to, and including, 1.7.3. This makes it possible for authenticated attackers, with subscriber-level access and above, to apply and remove watermarks from images.

The Checkout Fields Manager WordPress plugin before 1.0.2, Abandoned Cart Recovery WordPress plugin before 1.2.5, Custom Fields for WooCommerce WordPress plugin before 1.0.4, Custom Order Number WordPress plugin through 1.0.1, Custom Registration Forms Builder WordPress plugin before 1.0.2, Advanced Free Gifts WordPress plugin before 1.0.2, Gift Registry for WooCommerce WordPress plugin through 1.0.1, Image Watermark for WooCommerce WordPress plugin before 1.0.1, Order Approval for WooCommerce WordPress plugin before 1.1.0, Order Tracking for WooCommerce WordPress plugin before 1.0.2, Price Calculator for WooCommerce WordPress plugin through 1.0.3, Product Dynamic Pricing and Discounts WordPress plugin through 1.0.6, Product Labels and Stickers WordPress plugin through 1.0.1 have flawed CSRF checks in various places, which could allow attackers to make logged in users perform unwanted actions