The Userback plugin for WordPress is vulnerable to unauthorized access of data due to a missing capability check on the userback_get_json function in all versions up to, and including, 1.0.15. This makes it possible for authenticated attackers, with Subscriber-level access and above, to extract plugin's configuration data including the Userback API access token and site's posts/pages contents, including those that have private and draft status.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Userback Plugin | — | Update userback plugin to version 1.0.16, or a newer patched version | Jun 25, 2026 | Dec 12, 2025 |
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