The WPML plugin for WordPress is vulnerable to Remote Code Execution in all versions up to, and including, 4.6.12 via Twig Server-Side Template Injection. This is due to missing input validation and sanitization on the render function. This makes it possible for authenticated attackers, with Contributor-level access and above, to execute code on the server.

Cross-Site Request Forgery (CSRF) vulnerability in WPML Multilingual CMS premium plugin <= 4.5.13 on WordPress.

The WPML plugin before 3.1.9 for WordPress does not properly handle multiple actions in a request, which allows remote attackers to bypass nonce checks and perform arbitrary actions via a request containing an action POST parameter, an action GET parameter, and a valid nonce for the action GET parameter.

SQL injection vulnerability in the WPML plugin before 3.1.9 for WordPress allows remote attackers to execute arbitrary SQL commands via the lang parameter in the HTTP Referer header in a wp-link-ajax action to comments/feed.

The WPML Multilingual CMS plugin for WordPress is vulnerable to SQL Injection via the 'sorting' parameter in all versions up to, and including, 4.9.5 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for authenticated attackers, with translator-level access and above, to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database.

The WPML Multilingual CMS plugin for WordPress is vulnerable to time-based SQL Injection via the ‘elementIds’ parameter in all versions up to, and including, 4.9.5 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for authenticated attackers, with Subscriber-level access and above, to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database. This vulnerability is exploitable due to an authorization bypass where the registered authorization callback fails to execute, allowing any authenticated user regardless of role to access administrative translation functionalities.

The WPML plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's wpmllanguageswitcher shortcode in versions 3.6.0 - 4.7.3 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 "menu sync" function in the WPML plugin before 3.1.9 for WordPress allows remote attackers to delete arbitrary posts, pages, and menus via a crafted request to sitepress-multilingual-cms/menu/menus-sync.php.

processforms in the WPML (aka sitepress-multilingual-cms) plugin through 3.6.3 for WordPress has XSS via any localefilename parameter (such as localefilenameen) in an authenticated theme-localization.php request to wp-admin/admin.php.

Broken Access Control vulnerability in WPML Multilingual CMS premium plugin <= 4.5.10 on WordPress allows users with a subscriber or higher user role to change plugin settings (selected language for legacy widgets, the default behavior for media content).

Cross-site scripting (XSS) vulnerability in the WPML plugin before 3.1.9 for WordPress allows remote attackers to inject arbitrary web script or HTML via the target parameter in a reminderpopup action to the default URI.

Broken Access Control vulnerability in WPML Multilingual CMS premium plugin <= 4.5.10 on WordPress allows users with subscriber or higher user roles to change the status of the translation jobs.

Cross-Site Request Forgery (CSRF) vulnerability in WPML Multilingual CMS premium plugin <= 4.5.13 on WordPress.