Access violation vulnerability in Qi Blocks 1.4.3

The Qi Blocks plugin for WordPress has a security vulnerability that affects all versions up to 1.4.3. This vulnerability is caused by the plugin not properly checking for authorization when storing CSS styles submitted through the `qi-blocks/v1/update-styles` REST API endpoint. As a result, attackers who are logged in with Contributor-level access or higher can inject their own CSS code, which can be used to hide content, create fake UI elements, or steal sensitive information.

Detected in:

Qi Blocks fixed vulnerable versions: >= * <= 1.4.3

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Version compare shows which versions have a vulnerability. For example: >= 2.2.8 <= 2.2.21 means:

> from 2.2.8
= including 2.2.8 & 2.2.21
< to 2.2.21

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