The Social Sharing (by Danny) plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'dvk_social_sharing' shortcode in all versions up to, and including, 1.3.7 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 MC4WP: Mailchimp Top Bar 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, 1.6.0. 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.

The Koko Analytics 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, 1.3.12. 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.

The MC4WP: Mailchimp for WordPress plugin for WordPress is vulnerable to Stored Cross-Site Scripting via admin settings in all versions up to, and including, 4.9.16 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 MC4WP: Mailchimp for WordPress plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'email' parameter when a placeholder such as {email} is used for the field in versions 4.9.9 to 4.9.16 due to insufficient input sanitization and output escaping. 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.

The HTML Forms WordPress plugin before 1.3.33 does not sanitize and escape the form message inputs, allowing high-privilege users, such as administrators, to perform Stored Cross-Site Scripting (XSS) attacks even when the unfiltered_html capability is disabled.

Missing Authorization vulnerability in ibericode MC4WP.This issue affects MC4WP: from n/a through 4.9.9.

URL Redirection to Untrusted Site ('Open Redirect') vulnerability in PluginOps MailChimp Subscribe Form, Optin Builder, PopUp Builder, Form Builder.This issue affects MailChimp Subscribe Form, Optin Builder, PopUp Builder, Form Builder: from n/a through 4.0.9.3.

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in ibericode HTML Forms allows Stored XSS.This issue affects HTML Forms: from n/a through 1.3.28.

The HTML Forms WordPress plugin before 1.3.25 does not properly properly escape a parameter before using it in a SQL statement, leading to a SQL injection exploitable by high privilege users