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 WordPress File Upload and WordPress File Upload Pro plugins for WordPress are vulnerable to Stored Cross-Site Scripting via admin settings in versions up to, and including, 4.19.1 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level permissions and above, 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.

The WordPress File Upload and WordPress File Upload Pro plugins for WordPress are vulnerable to Path Traversal in versions up to, and including, 4.19.1 via the vulnerable parameter wfu_newpath. This allows administrator-level attackers to move files uploaded with the plugin (located in wp-content/uploads by default) outside of the web root.

The WordPress File Upload Free and Pro WordPress plugins before 4.16.3 allow users with a role as low as Contributor to perform path traversal via a shortcode argument, which can then be used to upload a PHP code disguised as an image inside the auto-loaded directory of the plugin, resulting in arbitrary code execution.

The WordPress File Upload WordPress plugin before 4.16.3, wordpress-file-upload-pro WordPress plugin before 4.16.3 does not escape some of its shortcode argument, which could allow users with a role as low as Contributor to perform Cross-Site Scripting attacks

The WordPress File Upload WordPress plugin before 4.16.3, wordpress-file-upload-pro WordPress plugin before 4.16.3 allows users with a role as low as Contributor to configure the upload form in a way that allows uploading of SVG files, which could be then be used for Cross-Site Scripting attacks