Conditional Fields for Contact Form 7 WordPress plugin through version 2.7.2 contains an uncontrolled resource consumption vulnerability in the Wpcf7cfMailParser class where the hide_hidden_mail_fields_regex_callback() method reads an iteration count directly from user-supplied POST parameters without validation or upper bound enforcement. Unauthenticated attackers can supply an arbitrarily large integer value through the REST API endpoint to cause unbounded loop execution with multiple preg_replace() operations, exhausting server memory and crashing the PHP process.

Missing Authorization vulnerability in Jules Colle Conditional Fields for Contact Form 7 cf7-conditional-fields allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Conditional Fields for Contact Form 7: from n/a through <= 2.4.1.

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Jules Colle Conditional Fields for Contact Form 7 cf7-conditional-fields allows Stored XSS.This issue affects Conditional Fields for Contact Form 7: from n/a through <= 2.4.15.

The Conditional Fields for Contact Form 7 plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 2.4.13. This is due to missing or incorrect nonce validation on the wpcf7cf_admin_init function. This makes it possible for unauthenticated attackers to reset the plugin's settings via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.