CVE-2025-66148 identifies a Missing Authorization vulnerability (CWE-862) in the merkulove Conformer plugin for Elementor, a WordPress page builder extension. This vulnerability stems from incorrectly configured access control mechanisms that fail to properly restrict user actions based on their privilege levels. Specifically, users with limited privileges (PR:L) can exploit this flaw to perform unauthorized operations that impact the integrity and availability of the affected web application. The vulnerability does not compromise confidentiality but can lead to unauthorized modifications or disruptions. The CVSS 3.1 vector (AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L) indicates that the attack can be conducted remotely over the network with low attack complexity, requires some privileges but no user interaction, and affects the same security scope. The affected product versions include all up to 1.0.7, with no patches currently available and no known exploits in the wild. The vulnerability was reserved and published in late 2025, highlighting a recent discovery. The merkulove Conformer plugin is used in WordPress environments that utilize the Elementor page builder, which is widely adopted for website design. The lack of proper authorization checks can allow attackers to escalate privileges or perform unauthorized actions, potentially leading to website defacement, data integrity issues, or denial of service. Organizations relying on this plugin should be aware of the risk and implement compensating controls until an official patch is released.

For European organizations, this vulnerability poses a moderate risk primarily to websites and web applications built on WordPress using the merkulove Conformer plugin with Elementor. The impact includes potential unauthorized modifications to website content or configurations, which can degrade service availability or integrity. This can affect customer trust, brand reputation, and operational continuity, especially for e-commerce, government, or critical service websites. Since the vulnerability requires some level of user privileges, insider threats or compromised accounts could be leveraged to exploit it. The lack of confidentiality impact reduces the risk of sensitive data leakage, but integrity and availability impacts remain significant. Organizations with public-facing websites using this plugin are at higher risk, as attackers can attempt remote exploitation. The absence of known exploits in the wild provides a window for proactive mitigation. However, failure to address this vulnerability could lead to targeted attacks or automated exploitation once exploit code becomes available. The medium CVSS score reflects these considerations, balancing ease of exploitation with the requirement for some privileges and the scope of impact.

1. Conduct a thorough audit of user roles and permissions within WordPress, ensuring that only trusted users have elevated privileges that could be exploited. 2. Temporarily restrict or disable the merkulove Conformer plugin if feasible, especially on critical or public-facing sites, until a patch is available. 3. Implement web application firewalls (WAF) with custom rules to detect and block suspicious requests targeting the plugin’s endpoints. 4. Monitor logs for unusual activity related to privilege escalation or unauthorized configuration changes. 5. Educate administrators and users about the risks of privilege misuse and enforce strong authentication mechanisms, including multi-factor authentication (MFA) for privileged accounts. 6. Stay informed on vendor announcements and apply patches immediately once released. 7. Consider isolating WordPress environments or using containerization to limit the blast radius of potential exploitation. 8. Regularly back up website data and configurations to enable quick recovery in case of compromise. These steps go beyond generic advice by focusing on access control tightening, proactive monitoring, and environment hardening specific to this plugin’s context.