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 Slider comparison image before and after plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's [sciba] shortcode in all versions up to, and including, 0.8.3 due to insufficient input sanitization and output escaping on user supplied attributes. 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 Comparison Slider plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on several AJAX actions in all versions up to, and including, 1.0.5. This makes it possible for authenticated attackers, with subscriber access or above, to change plugin settings and perform other actions such deleting sliders.

The Comparison Slider plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 1.0.5. This is due to missing or incorrect nonce validation on several functions hooked to AJAX actions. This makes it possible for unauthenticated attackers to change slider titles, delete sliders and modify plugin settings via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.

The Comparison Slider plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the slider title parameter in all versions up to, and including, 1.0.5 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with subscriber access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.