CVE-2025-15001 is a critical authorization bypass vulnerability classified under CWE-639, found in the FS Registration Password plugin for WordPress. The vulnerability arises because the plugin fails to properly validate a user's identity before allowing password updates. This flaw permits unauthenticated attackers to arbitrarily change the passwords of any user, including administrators, effectively enabling account takeover and privilege escalation. The vulnerability affects all versions of the plugin up to and including 1.0.1. The attack vector is network-based with no required authentication or user interaction, making exploitation straightforward. The CVSS 3.1 base score is 9.8, indicating critical severity with high impact on confidentiality, integrity, and availability. The plugin’s failure to enforce proper authorization checks allows attackers to bypass intended access controls, compromising the entire WordPress site. No patches or fixes are currently linked, and no known exploits have been reported in the wild, but the risk remains significant given the ease of exploitation and potential damage. This vulnerability highlights the importance of rigorous identity verification in password management functionalities within web applications.

The impact of CVE-2025-15001 is severe for organizations running WordPress sites with the FS Registration Password plugin installed. Successful exploitation allows attackers to reset passwords of any user, including administrators, leading to full account takeover. This can result in unauthorized access to sensitive data, defacement, data loss, or deployment of malware such as ransomware. The integrity and availability of the website are at risk, potentially disrupting business operations and damaging organizational reputation. Since WordPress powers a significant portion of the web, including many small to medium enterprises and large organizations, the scope of affected systems is broad. Attackers could leverage compromised admin accounts to pivot deeper into internal networks or use the site as a platform for further attacks. The lack of authentication or user interaction needed for exploitation increases the likelihood of automated mass attacks targeting vulnerable sites. Organizations may face regulatory and compliance consequences if sensitive user data is exposed or manipulated due to this vulnerability.

Immediate mitigation steps include disabling or uninstalling the FS Registration Password plugin until a secure patch is released. Organizations should monitor official vendor channels and WordPress plugin repositories for updates addressing this vulnerability. If patching is not immediately possible, implement web application firewall (WAF) rules to block unauthorized password change requests targeting the plugin’s endpoints. Restrict access to the WordPress admin and password reset functionalities by IP whitelisting or VPN access where feasible. Conduct thorough audits of user accounts and reset passwords for all privileged users to prevent unauthorized access. Enable multi-factor authentication (MFA) on all administrator accounts to reduce the risk of account takeover. Regularly review WordPress logs for suspicious activity related to password changes. Educate site administrators on the risks and signs of compromise. Finally, consider alternative, well-maintained plugins for password management that follow secure coding practices and proper authorization checks.