The SecuPress Free — WordPress Security plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 2.2.5.1. This is due to missing or incorrect nonce validation on the secupress_blackhole_ban_ip() function. This makes it possible for unauthenticated attackers to block a user's IP via a forged request granted they can trick the user into performing an action such as clicking on a link.

The SecuPress Free — WordPress Security plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's secupress_check_ban_ips_form shortcode in all versions up to, and including, 2.2.5.3 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.

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in SecuPress SecuPress Free secupress allows DOM-Based XSS.This issue affects SecuPress Free: from n/a through <= 2.2.5.3.

The SecuPress Free — WordPress Security plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the 'secupress_reinstall_plugins_admin_ajax_cb' function in all versions up to, and including, 2.3.9. This makes it possible for authenticated attackers, with Subscriber-level access and above, to install arbitrary plugins.