CVE-2025-66127 is a vulnerability classified as missing authorization in the g5theme Essential Real Estate WordPress plugin, affecting versions up to and including 5.2.2. This flaw arises from incorrectly configured access control security levels, allowing attackers with low privileges (PR:L) to perform unauthorized actions remotely (AV:N) without requiring user interaction (UI:N). The vulnerability impacts confidentiality and integrity to a limited extent (C:L/I:L), but does not affect availability (A:N). The plugin is commonly used for managing real estate listings and related content on WordPress sites, making it a target for attackers aiming to access or modify sensitive property data or user information. The vulnerability does not require elevated privileges beyond low-level authentication, which increases the risk in environments where user accounts are not tightly controlled. No known exploits have been reported in the wild, and no official patches have been linked yet, indicating that organizations should proactively assess their exposure. The CVSS 3.1 vector (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N) and score of 5.4 classify this as a medium severity issue. The root cause is an access control misconfiguration, which is a common security weakness that can be mitigated by proper authorization checks and role-based access controls. Given the plugin’s role in managing sensitive real estate data, unauthorized access could lead to data leakage or unauthorized content modification, impacting business operations and customer trust.

For European organizations, especially those operating real estate websites using the Essential Real Estate plugin, this vulnerability could lead to unauthorized access to sensitive property listings, client information, or administrative functions. While the impact on confidentiality and integrity is limited, unauthorized modifications or data disclosures could damage reputation, violate data protection regulations such as GDPR, and result in financial losses or legal penalties. The vulnerability’s requirement for low-level authentication means that insider threats or compromised low-privilege accounts could be leveraged to exploit this flaw. The lack of availability impact reduces the risk of service disruption, but data integrity issues could still affect business processes. Organizations relying heavily on digital real estate platforms in Europe’s mature property markets could face targeted exploitation attempts, especially if patching is delayed or access controls are weak. Additionally, attackers might use this vulnerability as a foothold for further attacks within the network.

Organizations should immediately inventory their WordPress installations to identify the use of the g5theme Essential Real Estate plugin and verify the version in use. Until an official patch is released, administrators should review and tighten access control configurations within the plugin and WordPress roles to ensure that only authorized users have access to sensitive functions. Implementing the principle of least privilege for all user accounts is critical. Monitoring logs for unusual access patterns or privilege escalations related to the plugin can help detect exploitation attempts early. Employing Web Application Firewalls (WAFs) with custom rules to restrict unauthorized access to plugin endpoints may provide temporary protection. Regular backups of website data and configurations should be maintained to enable recovery from unauthorized modifications. Once a patch becomes available, prompt testing and deployment are essential. Additionally, educating site administrators about the risks of weak access controls and enforcing strong authentication mechanisms will reduce the likelihood of exploitation.