The WP Duplicate plugin for WordPress is vulnerable to Missing Authorization leading to Arbitrary File Upload in all versions up to and including 1.1.8. This is due to a missing capability check on the `process_add_site()` AJAX action combined with path traversal in the file upload functionality. This makes it possible for authenticated (subscriber-level) attackers to set the internal `prod_key_random_id` option, which can then be used by an unauthenticated attacker to bypass authentication checks and write arbitrary files to the server via the `handle_upload_single_big_file()` function, ultimately leading to remote code execution.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Local Sync Plugin | — | Update local-sync plugin to version 1.1.9, or a newer patched version | Feb 10, 2026 | Feb 5, 2026 |
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