atec Duplicate Page & Post <= 1.2.20 - Missing Authorization to Authenticated (Contributor+) Arbitrary Post Duplication and Data Exposure

The atec Duplicate Page & Post plugin for WordPress is vulnerable to unauthorized post duplication due to missing authorization validation on the duplicate_post() function in all versions up to, and including, 1.2.20. This makes it possible for authenticated attackers, with Contributor-level access and above, to duplicate arbitrary posts, including private and password-protected posts, leading to data exposure.