CVE-2025-31769 identifies a Cross-Site Request Forgery (CSRF) vulnerability in the NiteoThemes CLP – Custom Login Page WordPress plugin, affecting all versions up to and including 1.5.5. CSRF vulnerabilities occur when a web application does not properly verify that requests modifying state originate from legitimate users, allowing attackers to craft malicious web pages that cause authenticated users to unknowingly perform unwanted actions. In this case, the vulnerability enables attackers to send forged requests that could alter the login page configuration or other plugin-managed settings without the user's consent. The plugin is commonly used to customize WordPress login pages, which are critical for user authentication workflows. The vulnerability requires the victim to be authenticated on the WordPress site and visit a malicious site controlled by the attacker, which then triggers the unauthorized request. No authentication bypass or remote code execution is indicated, but the integrity of the login page settings can be compromised. There are no known public exploits or patches available at the time of publication. The absence of a CVSS score necessitates an assessment based on the impact on confidentiality, integrity, and availability, ease of exploitation, and scope. Since the attack requires authentication and user interaction (visiting a malicious site), but can lead to unauthorized changes affecting site integrity, the severity is assessed as high. The vulnerability is relevant to any organization using this plugin, particularly those relying on customized login pages for branding or security purposes. The lack of immediate patches means organizations should implement compensating controls such as anti-CSRF tokens, strict user role management, and monitoring for anomalous requests until an official fix is released.

The primary impact of CVE-2025-31769 is on the integrity of affected WordPress sites using the NiteoThemes CLP plugin. An attacker can exploit this CSRF vulnerability to perform unauthorized actions on the login page configuration, potentially changing settings that affect user authentication workflows or site appearance. This could lead to user confusion, reduced trust, or indirect facilitation of further attacks if login page security is weakened. While confidentiality and availability impacts are limited, the unauthorized modification of login page settings can disrupt normal operations and complicate incident response. Organizations with high-value or sensitive user bases relying on customized login pages are at greater risk. The ease of exploitation is moderate since it requires the victim to be authenticated and visit a malicious site, but no advanced technical skills or direct server access are needed. The scope includes all WordPress sites running vulnerable versions of the plugin, which may be widespread given the popularity of WordPress and third-party login page customizations. Without mitigation, attackers could leverage this vulnerability to undermine site integrity and potentially facilitate further attacks such as phishing or credential theft.

1. Apply patches from NiteoThemes immediately once they are released to address CVE-2025-31769. 2. Until patches are available, implement web application firewall (WAF) rules to detect and block suspicious POST requests targeting the plugin’s endpoints. 3. Enforce strict user role and permission management to limit administrative access only to trusted users. 4. Enable and verify the presence of anti-CSRF tokens in all forms and requests related to the plugin’s configuration interfaces. 5. Educate users and administrators about the risks of CSRF and advise against visiting untrusted websites while authenticated to the WordPress admin panel. 6. Monitor server and application logs for unusual or unauthorized changes to login page settings. 7. Consider temporarily disabling or replacing the plugin if immediate patching is not feasible and the risk is unacceptable. 8. Regularly update WordPress core and all plugins to minimize exposure to known vulnerabilities. 9. Use Content Security Policy (CSP) headers to restrict the domains from which scripts can be loaded, reducing the risk of malicious script execution. 10. Conduct periodic security assessments and penetration testing focusing on authentication and configuration management interfaces.