This vulnerability in PenciDesign PenNews (versions before 6.7.3) arises from improper validation of filenames used in PHP include or require statements, leading to PHP Local File Inclusion. This can allow an attacker to include unintended files on the server, potentially resulting in remote code execution or disclosure of sensitive information. The CVSS 3.1 base score is 8.1, reflecting network attack vector, high impact on confidentiality, integrity, and availability, and no required privileges or user interaction.

Successful exploitation can lead to full compromise of the affected system by allowing attackers to execute arbitrary code or access sensitive files. The vulnerability affects confidentiality, integrity, and availability of the system. No known exploits have been reported in the wild so far.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no patch or official fix information is provided, users should monitor PenciDesign's advisories for updates. Until a fix is available, consider restricting access to vulnerable endpoints and applying web application firewall rules to block suspicious include/require requests if possible.