CVE-2025-39375 is a Cross-Site Request Forgery (CSRF) vulnerability identified in the Ashok G Easy Child Theme Creator plugin, affecting versions up to 1.3.1. CSRF vulnerabilities allow an attacker to trick an authenticated user into submitting unwanted actions on a web application in which they are currently authenticated. In this case, the vulnerability exists because the plugin does not adequately verify that requests to perform certain actions originate from legitimate users or trusted sources. This can enable an attacker to craft malicious web requests that, when executed by an authenticated administrator or user with sufficient privileges, could alter the configuration or behavior of the Easy Child Theme Creator plugin without the user's consent. The CVSS 3.1 base score of 4.3 (medium severity) reflects that the attack vector is network-based (remote), requires no privileges, but does require user interaction (the victim must visit a malicious site or click a crafted link). The impact is limited to integrity, with no direct confidentiality or availability impact. No known exploits are currently in the wild, and no patches have been published yet. The vulnerability is categorized under CWE-352, which is a common web application security weakness related to insufficient request validation against CSRF attacks. The plugin is typically used within WordPress environments to create child themes, which means the vulnerability could affect WordPress sites using this plugin, potentially allowing unauthorized changes to theme configurations or settings.

For European organizations, the impact of this vulnerability depends on the extent of Easy Child Theme Creator plugin usage within their WordPress environments. If exploited, attackers could manipulate theme settings or configurations without authorization, potentially leading to website defacement, unauthorized content changes, or the insertion of malicious code if the attacker can influence theme files indirectly. Although the vulnerability does not directly compromise confidentiality or availability, unauthorized integrity changes can undermine trust in the website, damage brand reputation, and potentially facilitate further attacks such as phishing or malware distribution. Organizations in sectors with high web presence—such as e-commerce, media, and government—may face reputational damage and customer trust erosion. Since exploitation requires user interaction and an authenticated session, the risk is somewhat mitigated but remains significant for sites with administrative users who might be targeted via social engineering. The lack of known exploits in the wild suggests limited immediate threat but does not preclude future exploitation once the vulnerability becomes widely known.

To mitigate this vulnerability, European organizations should first verify if the Easy Child Theme Creator plugin is installed and active on their WordPress sites. If so, they should monitor for official patches or updates from the vendor and apply them promptly once available. In the interim, administrators can implement additional CSRF protections such as enforcing strict same-site cookie policies (SameSite=strict or lax) to reduce the risk of cross-origin requests. Employing Web Application Firewalls (WAFs) with rules to detect and block suspicious CSRF patterns can provide an additional layer of defense. Limiting administrative access to trusted networks or VPNs reduces exposure to external CSRF attacks. Educating administrators about the risks of clicking unknown links or visiting untrusted websites while logged into administrative accounts can help prevent user interaction-based exploitation. Finally, reviewing and hardening WordPress security configurations, including disabling unused plugins and enforcing least privilege principles for user roles, will reduce the overall attack surface.