Theme Editor <= 3.1 - Cross-Site Request Forgery to CSS Modification
Affected versions: *-3.1
Vulnerability type: CWE-352 Cross-Site Request Forgery (CSRF)
Affected software, patched versions and attribution
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.
Theme Editor
Affected versions: *-3.1
Patched versions: 3.2
Researcher credit: Nabil Irawan
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- Published
- July 31, 2026
- CVSS
- 4.3