Hash Form < 1.2.9 - Cross-Site Request Forgery

Description

The Hash Form plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 1.2.8. This is due to missing or incorrect nonce validation on the add_more_condition_block() function. This makes it possible for unauthenticated attackers to update block conditions via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.