The Coming Soon Page & Maintenance Mode plugin for WordPress is vulnerable to unauthorized access of data due to an improperly implemented URL check in the wpsm_coming_soon_redirect function in all versions up to, and including, 2.2.1. This makes it possible for unauthenticated attackers to view a site with maintenance mode or coming-soon mode enabled to view the site's content.

The WordPress Coming Soon Page & Maintenance Mode plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the logo_width, logo_height, rcsp_logo_url, home_sec_link_txt, rcsp_headline and rcsp_description parameters in versions up to, and including, 1.8.1 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

The Coming Soon Page & Maintenance Mode plugin for WordPress is vulnerable to unauthenticated settings reset in versions up to, and including 1.8.1 due to missing capability checks in the ~/functions/data-reset-post.php file which makes it possible for unauthenticated attackers to trigger a plugin settings reset.

The Tabs WordPress plugin before 2.2.8 does not sanitise and escape Tab descriptions, which could allow high privileged users with a role as low as editor to perform Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed

The Testimonial WordPress plugin before 1.6.0 does not escape some testimonial fields which could allow high privilege users to perform Cross Site Scripting attacks even when the unfiltered_html capability is disallowed

Authenticated (editor+) Stored Cross-Site Scripting (XSS) vulnerability in wpshopmart Testimonial Builder plugin <= 1.6.1 at WordPress.

Low privileged users can use the AJAX action 'cp_plugins_do_button_job_later_callback' in the WP Maintenance Mode & Site Under Construction WordPress plugin before 1.8.2, to install any plugin (including a specific version) from the WordPress repository, as well as activate arbitrary plugin from then blog, which helps attackers install vulnerable plugins and could lead to more critical vulnerabilities like RCE.

The tabs-responsive plugin 1.8.0 for WordPress has XSS via the post_title parameter to wp-admin/post.php.