Schema & Structured Data for WP & AMP vulnerabilities

The Schema & Structured Data for WP & AMP plugin before 1.66 fails to check user permissions to edit a specific post when generating schema, allowing users with contributor role and above to read other users' draft, pending, private and password-protected posts.

The plugin before 1.66 does not correctly verify comment ownership or moderation status before returning content, allowing unauthenticated users to read comments still awaiting moderation or marked as spam.

The plugin before 1.66 does not check if a post is password protected before including its content in structured data, allowing unauthenticated users to obtain password-protected post content through multiple public output routes.

The Schema & Structured Data for WP & AMP WordPress plugin before 1.60 does not check user capabilities on its frontend AJAX file-upload handlers and does not validate the actual content of uploaded files against the endpoint's intended media type, allowing unauthenticated users to upload any file type accepted by WordPress's media library through endpoints that should only accept images or videos.