CVE-2026-9067

The Schema & Structured Data for WP & AMP WordPress plugin before version 1.67 does not perform a capability check when saving several of its fields, nor escape them when outputting them back, allowing users with the editor role and above to inject arbitrary web scripts that execute when a higher privileged user views the affected screen. This is only exploitable on multisite installs, where editors do not hold the unfiltered_html capability.

The Schema & Structured Data for WP & AMP plugin version 1.66 and earlier contains a PHP Object Injection vulnerability that can be exploited by a user with Contributor role. The vulnerability allows injection of serialized PHP objects, potentially leading to arbitrary code execution or other unauthorized actions.

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.