TinyPNG < 3.4.4 - Cross-Site Request Forgery

Description

The TinyPNG plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 3.4.3. This is due to missing or incorrect nonce validation on the update_api_key() function and other functions. This makes it possible for unauthenticated attackers to update settings via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.