iSpring Embedder <= 1.0 - Cross-Site Request Forgery to Arbitrary File Upload

Description

The iSpring Embedder plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 1.0. This is due to missing or incorrect nonce validation on a function. This makes it possible for unauthenticated attackers to upload arbitrary files via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.