Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in hwk-fr WP 404 Auto Redirect to Similar Post allows Reflected XSS.This issue affects WP 404 Auto Redirect to Similar Post: from n/a through 1.0.4.

The WP 404 Auto Redirect to Similar Post plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the ‘request’ parameter in all versions up to, and including, 1.0.3 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 Advanced Custom Fields: Extended plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'acfe_form' shortcode in versions up to, and including, 0.8.9.3 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers with contributor-level and above permissions to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Auth. (admin+) Stored Cross-Site Scripting (XSS) vulnerability in hwk-fr WP 404 Auto Redirect to Similar Post plugin <= 1.0.3 versions.