CVE-2021-24163

The AJAX action, wp_ajax_ninja_forms_sendwp_remote_install_handler, did not have a capability check on it, nor did it have any nonce protection, therefore making it possible for low-level users, such as subscribers, to install and activate the SendWP Ninja Forms Contact Form – The Drag and Drop Form Builder for WordPress WordPress plugin before 3.4.34 and retrieve the client_secret key needed to establish the SendWP connection while also installing the SendWP plugin.

• CWE-200
• CWE-862

• https://wpscan.com/vulnerability/55fde9fa-f6cd-4546-bee8-4acc628251c2Exploit, Third Party Advisory
• https://www.wordfence.com/blog/2021/02/one-million-sites-affected-four-severe-vulnerabilities-patched-in-ninja-forms/Third Party Advisory
• https://wpscan.com/vulnerability/55fde9fa-f6cd-4546-bee8-4acc628251c2Exploit, Third Party Advisory
• https://www.wordfence.com/blog/2021/02/one-million-sites-affected-four-severe-vulnerabilities-patched-in-ninja-forms/Third Party Advisory

Published

Apr 5, 2021

Last Modified

Jun 17, 2026

Status

Modified

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