Kadence Blocks vulnerabilities

A Sensitive Data Exposure vulnerability at the contributor level in the Gutenberg Blocks by Kadence Blocks plugin (versions up to 3.7.8) allows a user with the contributor role to access sensitive data that should not be available to them.

The Kadence Blocks plugin for WordPress up to version 3.7.8.1 contains a Stored Cross-Site Scripting (XSS) vulnerability in the Identity Block Inner Image Content. This is due to insufficient input sanitization and output escaping, allowing authenticated attackers with contributor-level access and above to inject arbitrary web scripts.

The Kadence Blocks plugin for WordPress up to version 3.7.7 is vulnerable to Insecure Direct Object Reference (IDOR). The authorization check uses a user-supplied post_id, but the actual read/delete operations on optimizer analysis records are performed using a hash of the post_path, which can be manipulated by the attacker. This allows authenticated attackers with Contributor-level access or higher to read or delete analysis records belonging to other users' posts.

The Kadence Blocks plugin for WordPress up to version 3.7.7 fails to properly verify user authorization, allowing authenticated attackers with contributor-level access or higher to create arbitrary Media Library attachments. Attackers can remotely download images to the uploads directory, bypassing the upload_files capability boundary.

The Kadence Blocks plugin for WordPress up to version 3.6.3 has an authorization bypass in the process_pattern REST API endpoint, which does not properly verify the upload_files capability. Authenticated attackers with contributor level access or above can upload images to the Media Library by supplying remote image URLs.