CVE-2025-39561 identifies a missing authorization vulnerability (CWE-862) in the LoginWP - Pro plugin developed by Marketing Fire, LLC, affecting all versions up to 4.0.8.5. This vulnerability arises because certain functionalities within the plugin are not properly constrained by access control lists (ACLs), allowing unauthorized users to invoke these functions. The CVSS 3.1 base score of 6.5 reflects a medium severity rating, with the vector indicating that the attack can be performed remotely (AV:N), requires low attack complexity (AC:L), no privileges (PR:N), and no user interaction (UI:N). The impact affects integrity and availability but not confidentiality, meaning attackers could potentially alter data or disrupt service without gaining access to sensitive information. The vulnerability is particularly concerning in WordPress environments where LoginWP - Pro is used to manage login workflows, as unauthorized access to these functions could lead to manipulation of authentication processes or denial of service. No patches or known exploits are currently reported, but the vulnerability's nature suggests that exploitation could be straightforward once a proof-of-concept is developed. The issue was reserved in April 2025 and published in January 2026, indicating recent discovery and disclosure. Organizations relying on this plugin should prioritize assessment and remediation to prevent exploitation.

For European organizations, the missing authorization vulnerability in LoginWP - Pro could lead to unauthorized manipulation of login workflows, potentially allowing attackers to disrupt authentication mechanisms or alter system behavior. This could result in denial of service, degraded user experience, or unauthorized changes to login configurations, impacting business continuity and operational integrity. Although confidentiality is not directly affected, the integrity and availability impacts can have cascading effects, such as enabling further attacks or causing service outages. Organizations in sectors with high reliance on WordPress-based portals, including e-commerce, government, and education, may face increased risk. The lack of required privileges or user interaction for exploitation increases the threat level, as attackers can remotely target vulnerable systems without prior access. The absence of known exploits provides a window for proactive mitigation, but also means that organizations should not delay patching once updates become available. Failure to address this vulnerability could expose European entities to targeted attacks, especially those with public-facing WordPress sites using LoginWP - Pro.

1. Monitor Marketing Fire, LLC communications and official channels for patches addressing CVE-2025-39561 and apply them promptly upon release. 2. Until patches are available, restrict access to WordPress admin interfaces and LoginWP - Pro functionalities using network-level controls such as IP whitelisting or VPN access to limit exposure. 3. Implement Web Application Firewalls (WAFs) with rules designed to detect and block anomalous requests targeting LoginWP - Pro endpoints. 4. Conduct thorough audits of user roles and permissions within WordPress to ensure least privilege principles are enforced, minimizing potential exploitation impact. 5. Enable detailed logging and continuous monitoring of login-related activities to detect unauthorized function calls or suspicious behavior early. 6. Consider temporarily disabling or replacing LoginWP - Pro if critical business processes depend on it and no immediate patch is available. 7. Educate IT and security teams about the vulnerability specifics to enhance incident response readiness. 8. Regularly update all WordPress plugins and core installations to reduce overall attack surface.