CVE-2025-14392 is a vulnerability classified under CWE-862 (Missing Authorization) found in the Simple Theme Changer plugin for WordPress, developed by darendev. The issue arises because the plugin fails to perform proper capability checks on three critical actions: user_theme_admin, display_method_admin, and set_change_theme_button_name. These actions control the modification of the plugin’s settings. Due to this missing authorization, any authenticated user with subscriber-level privileges or higher can invoke these actions to alter the plugin’s configuration without having the necessary administrative rights. The vulnerability affects all versions up to and including version 1.0 of the plugin. The CVSS v3.1 base score is 4.3, indicating medium severity, with an attack vector of network (remote), low attack complexity, requiring privileges (low), no user interaction, and unchanged scope. The impact is limited to integrity, as attackers can modify plugin settings but cannot affect confidentiality or availability. No patches or exploit code are currently publicly available, and no known active exploitation has been reported. The vulnerability was published on December 12, 2025, and was reserved a few days earlier. Given the widespread use of WordPress and the plugin’s presence, this vulnerability could be leveraged to alter site appearance or behavior via theme changes, potentially facilitating further attacks or defacement.

The primary impact of CVE-2025-14392 is the unauthorized modification of the Simple Theme Changer plugin’s settings by users with subscriber-level access or higher. While this does not directly compromise sensitive data confidentiality or site availability, it undermines the integrity of the website’s theme configuration. Attackers could alter the visual presentation or functionality of the site, potentially misleading visitors or enabling further malicious activities such as phishing or malware distribution through manipulated themes. For organizations relying on this plugin, especially those with multiple users having subscriber or contributor roles, this vulnerability could be exploited to degrade brand reputation or user trust. Since the exploit requires only low privileges and no user interaction, it lowers the barrier for attackers who have gained minimal access. However, the absence of known exploits and the medium CVSS score suggest the threat is moderate but should not be ignored, particularly for high-profile or high-traffic WordPress sites.

To mitigate CVE-2025-14392, organizations should first verify if they use the Simple Theme Changer plugin and identify the version in use. Since no official patch links are currently available, administrators should consider the following specific actions: 1) Restrict plugin access by limiting subscriber-level user capabilities or upgrading user roles to reduce the number of users who can authenticate with subscriber or higher privileges; 2) Implement web application firewall (WAF) rules to monitor and block unauthorized requests targeting the vulnerable plugin actions (user_theme_admin, display_method_admin, set_change_theme_button_name); 3) Temporarily disable or uninstall the plugin if it is not essential to reduce attack surface; 4) Monitor WordPress logs for suspicious activity related to theme changes or plugin configuration modifications; 5) Stay alert for vendor updates or patches and apply them promptly once released; 6) Employ principle of least privilege for user roles and regularly audit user permissions to minimize risk; 7) Consider using alternative plugins with verified security postures if the Simple Theme Changer plugin is critical to operations.