What the vulnerability does
01Description
The Simple Theme Changer plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the user_theme_admin, display_method_admin, and set_change_theme_button_name actions actions in all versions up to, and including, 1.0. This makes it possible for authenticated attackers, with subscriber-level access and above, to modify the plugin's settings.
Explanation of Vulnerability in Simple Terms
02Summary
Simple Theme Changer versions 1.0 and earlier lack proper authorization checks on theme modification functions. A logged-in user with low privileges can change site themes without appropriate permission validation. This allows unauthorized theme alterations that could deface the site or inject malicious content through theme files.
What an attacker can do
03Attacker Capabilities
Change the site's active theme without proper authorization.
Potential impact on your site
04Site Impact
Unauthorized users can alter your site's appearance or inject malicious code via theme modification.
Conditions required to exploit
05Prerequisites
Attacker must have a low-privilege user account on the site.
Key dates
06Disclosure timeline
December 12, 2025
CVE published
April 8, 2026
Record updated