CVE-2025-14469: Theme Editor <= 3.1 - Cross-Site Request Forgery to CSS Modification

Severity: medium (CVSS 4.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-08-01 · updated 2026-09-29
Weakness: CWE-352

Description

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.

Affected products

mndpsingh287 Theme Editor: through 3.1

References

https://plugins.trac.wordpress.org/browser/theme-editor/trunk/includes/classes/ms_theme_editor_controller.php#L13
https://plugins.trac.wordpress.org/browser/theme-editor/trunk/includes/classes/ms_theme_editor_controller.php#L60
https://wordpress.org/plugins/theme-editor/#developers
https://www.wordfence.com/threat-intel/vulnerabilities/id/1dd4e39a-9b2f-4728-b026-2dee60257c46?source=cve

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