The Theme Editor plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 3.1. This is due to missing nonce validation on the ms_update AJAX action. This makes it possible for unauthenticated attackers to modify child theme CSS styles via a forged request granted they can trick an administrator into performing an action such as clicking on a link.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Theme Editor Plugin | — | Update theme-editor plugin to version 3.2, or a newer patched version | Aug 3, 2026 | Jul 31, 2026 |
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