The Frontend User Notes plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 2.1.0 via the 'funp_ajax_modify_notes' AJAX endpoint due to missing validation on a user controlled key. This makes it possible for authenticated attackers, with Subscriber-level access and above, to modify arbitrary notes that do not belong to them.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Frontend User Notes Plugin | — | Update frontend-user-notes plugin to version 2.1.1, or a newer patched version | Feb 18, 2026 | Feb 17, 2026 |
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