CVE-2025-14391: CSRF in Simple Theme Changer WordPress Plugin

An attacker exploiting this CSRF vulnerability can leverage a forged request to alter the Simple Theme Changer plugin's settings. This could involve changing the site's theme, color scheme, or other visual aspects, potentially disrupting the user experience or even injecting malicious code through theme customization options. While the direct impact might seem cosmetic, the ability to modify plugin settings without authentication represents a significant security risk, especially on sites with administrative access controlled by less experienced users. The attack vector relies on social engineering, requiring the attacker to convince an administrator to click a malicious link.

1. Reserved2025-12-09
2. Published2025-12-12
3. Modified2026-04-08
4. EPSS updated2026-03-23

The primary mitigation for CVE-2025-14391 is to upgrade the Simple Theme Changer plugin to a version that includes proper nonce validation. If upgrading immediately is not feasible due to compatibility issues or testing requirements, consider implementing stricter access controls for plugin settings. Limit access to plugin configuration pages to authorized administrators only. Web Application Firewalls (WAFs) can be configured to detect and block suspicious requests targeting the plugin's update endpoints. Monitor WordPress access logs for unusual activity, particularly requests originating from unfamiliar IP addresses attempting to modify plugin settings.