The Custom New User Notification plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's admin settings in all versions up to, and including, 1.2.0. This is due to insufficient input sanitization and output escaping on multiple settings fields including 'User Mail Subject', 'User From Name', 'User From Email', 'Admin Mail Subject', 'Admin From Name', and 'Admin From Email'. The settings are registered via register_setting() without sanitize callbacks, and the values retrieved via get_option() are echoed directly into HTML input value attributes without esc_attr(). This makes it possible for authenticated attackers, with Administrator-level access and above, to inject arbitrary web scripts in the plugin settings page that will execute whenever a user accesses that page. This could be used in multi-site installations where administrators of subsites could target super administrators.

Cross-Site Request Forgery (CSRF) vulnerability in rafasashi User Session Synchronizer user-session-synchronizer allows Stored XSS.This issue affects User Session Synchronizer: from n/a through <= 1.4.0.

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in rafasashi SVG Captcha svg-captcha allows Reflected XSS.This issue affects SVG Captcha: from n/a through <= 1.0.11.

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in rafasashi Todo Custom Field todo-custom-field allows Reflected XSS.This issue affects Todo Custom Field: from n/a through <= 3.0.4.

The Language Switcher plugin for WordPress is vulnerable to Reflected Cross-Site Scripting due to the use of add_query_arg without appropriate escaping on the URL in all versions up to, and including, 3.7.13. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link.