The vulnerability identified as CVE-2025-39570 affects the Lomu WPCOM Member plugin for WordPress up to version 1.7.7. It stems from improper control over the filename parameter used in PHP include or require statements, resulting in a Local File Inclusion (LFI) vulnerability. This can allow an attacker with at least limited privileges (PR:L) to include arbitrary files on the server, potentially leading to remote code execution or data disclosure. The CVSS 3.1 base score is 8.8, reflecting network attack vector, low attack complexity, no user interaction, and high impact on confidentiality, integrity, and availability. The vulnerability is published and assigned by Patchstack, but no official patch or remediation guidance is currently provided.

Successful exploitation of this vulnerability can lead to full compromise of the affected system, including unauthorized disclosure of sensitive information, modification of data, and disruption of service. The attacker requires at least limited privileges on the system but can execute code remotely without user interaction. This elevates the risk to high severity.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict access to the affected plugin and limit privileges of users who can interact with it. Monitor for updates from the vendor or security advisories for a patch or official mitigation instructions.